Baker’s A&P Oral and practical Study guide General section – Flashcards
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Ohm's Law (V = I x R)
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What is the most important law applicable to the study of electricity?
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Voltage (v), Current (I), Resistance (R)
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What are the elements of Ohm's Law?
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Mechanical (generator/ alternator), Chemical (battery), Photoelectric (light), and Thermal (heat)
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What are 4 sources of electrical power?
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A source of electrical pressure (EMF), Resistance in the form of an energy consuming electrical device(light bulb), Conductors to provide a path for electron flow (wires). (a Power source, a load, and a conductor connecting the load and the power source)
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What does an electrical circuit consist of?
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A Capacitor
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What represents capacitance in an AC circuit?
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To store electricity
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What is the function of a capacitor?
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When voltage is induced by magnetic flux lines in a coil in an AC circuit. The induced voltage is opposite in direction to the applied voltage, and opposes any change in the alternating current.
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What is Inductance?
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The total opposition for AC to flow caused by the combined effect of resistance, inductive reactance, and capacitive reactance in an AC circuit.
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What is impedance?
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The Watt. amp x volt = watt,
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What is the unit of measurement of power in a DC circuit?
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746 watts
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how many watts are in 1 horsepower?
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1000 watts
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What is a kilowatt?
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There will be an increase in current
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In a DC circuit, what occurs when voltage is increased, while the resistance remains the constant?
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They are Series circuits, Parallel circuits, and complex circuits (series-parallel)
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What are the 3 types of DC electrical circuits?
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It has 12 cells, and each cell is rated at 2 volts
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A 24 volt lead-acid battery has how many cells, and what is each cell rated at?
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It should be between 1.275 and 1.300
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What should be the specific gravity of the electrolytes in a fully charged lead acid battery?
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a Hydrometer
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What instrument is used to determine the specific gravity of electrolyte in a lead acid battery?
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The specific gravity of the electrolyte in a nickel cadmium battery does not change appreciably during charge or discharge of the battery.
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What can a hydrometer not be used to determine the charge of a nickel cadmium battery?
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Adjustments must be made if the temperature of the electrolyte is above 90° F or Below 70°F
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When using a hydrometer to check the charge of a lead acid battery, at what temperatures must a correction factor be applied to the reading?
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It is the transfer of electrical energy by means of a magnetic field (lines of flux). Transferring voltage from one conductor to another without physically touching
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What is electromagnetic induction?
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electromagnetic induction
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What is the principle of a transformers operation?
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They are coated with special corrosion resistant paint such as a bituminous paint, an asphaltic (tar based) paint, or with polyurethane enamel.
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How are battery compartments protected from against corrosion?
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Asphaltic paint, bituminous paint, and polyurethane enamel paint.
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What are the 3 types of paints used in a battery compartment?
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It should be approximately 3/8 inches above the plates. if the battery has baffle plates above the cell plates
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What should be the correct electrolyte level in a properly serviced battery?
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The electrolyte level should be up to the hole in the baffle plate in each cell.
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In a properly serviced battery that has baffle plates above the cell plates, how high should the correct electrolyte level be?
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This is when 2 or more generators are operated at the same time to supply power for a load that must be shared equally.
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What are paralleling generators, and how is the load distributed?
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this type of breaker makes it impossible to manually hold the circuit closed when excessive current is flowing through the circuit. (the breaker pops when the circuit gets hot, and cant be reset until the circuit has cooled off.)
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Describe a no-trip (trip-free) circuit breaker.
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No, the fumes from the lead acid battery can contaminate the electrolyte in the Ni-cad battery.
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Can Lead acid and Ni-cad batteries be stored together?
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this line type is a medium width line made up of short dashes. it shows lines or edges that can not be seen when looking at the part from a specific position.
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What types of lines are used on aircraft drawings to indicate hidden views?
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thin lines composed of alternating long and short dashes, and are used to indicate the center of an object.
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What types of lines are used on aircraft drawings to indicate center lines?
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medium width lines composed of one long and two short evenly spaced dashes. they show an alternate position of a part, or the relative position of a missing part.
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What types of lines are used on aircraft drawings to indicate alternate position lines?
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The difference between the plus and minus allowable dimension of a part. (± of .005 =.010)
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Define "Tolerance" as used in aircraft drawings.
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This is the dimension given for the space between parts.
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Define "Clearance" as used in aircraft drawings.
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1) the drawing number, 2) the name of the part/assembly, 3) the scale, 4) the date, 5) the name of the firm/company, 6) name of the draftsman, 7) the checker, and 8) the approving official.
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What information is given in the title block of a blueprint? (8 things)
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They are solid narrow lines, broken at midpoint for the insertion of measurements. They are used to indicate the size of an object.
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Why are dimensions used, and how are they shown on aircraft drawings?
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By it's revision letter (A,B,C, etc). the revision letters are usually listed in a table next to the title block, or in the corner of the drawing.
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How can a change to an aircraft drawing be identified?
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It is a list of materials and parts necessary for fabrication or assembly of a component or system.
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What is the "bill of materials" associated with aircraft drawings?
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Because they are a type of shorthand used in drawings. They express characteristics of a component with a minimum amount of drawing or writing.
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Why are symbols used when drawing aircraft blueprints?
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3 views: Front, Top, and Right side.
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How many views are used to determine the shape of an object, and what are they?
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It is the imaginary vertical line or plain from which all measurements are taken both forward and aft to determine the relative location of items in the aircraft in inches.
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what is the datum and its purpose when making weight and balance computations?
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The datum location is always specified by the manufacturer and can be found in the TCDS
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how do you find where the datum plain of an aircraft is located?
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For safety and efficiency in flight
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What is the purpose of weight and balance control?
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It is a force which tends to rotate the aircraft about one axis. It is obtained by multiplying the weight of an item (pounds) by the distance of the item from the datum (inches). expressed in inch-pounds. (W x A = M)
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When computing weight and balance, what is the "moment" and how is it obtained?
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It is the distance (in inches) an item is located either forward or aft of the datum. it is obtained by either actual measurement or from the aircraft weight and balance records.
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What is the "arm" of an item and how is it obtained?
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It is the weight of extra equipment used for weighing the aircraft such as chocks, blocks, jacks, and chains. This weight must be subtracted from the scale readings in order to obtain the Empty Weight of the aircraft.
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What is tare weight, and how is it handled when making weight and balance calculations.
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It is the amount of fuel that should be used in weight and balance computations when the aircraft is loaded for an extreme condition check. For a reciprocating engine airplane certified under FAR 23, this is the fuel necessary to operate the engine for ½ an hour at maximum continuous power.
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What is meant by minimum fuel, and how is it calculated for weight and balance?
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It is the fuel remaining in the tanks, sumps, lines, and engine after fuel exhaustion. it is also called undrainable or unusable fuel. It is part of the aircrafts empty weight
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What is meant by Residual Fuel?
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Re-weigh the aircraft and calculate new weight and balance records
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how would you determine the empty weight and the empty weight C.G. of an aircraft if all weight and balance records are missing?
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It can be lead bars, metal plates, shot bags, sand bags, or other items of weight which are placed in the aircraft to attain a desired C.G. location.
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What is Ballast?
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The C.G. location in a helicopter is much more critical than fixed wing aircraft. (forward, aft, port, and starboard must be calculated.) C.G. range in some choppers will be less than 3 inches
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What is the difference between fixed wing and rotor wing (helicopter) aircraft C.G. ranges?
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All operations equipment, whether it is required, optional, or special equipment must be included in the aircrafts empty weight.
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When weighing an aircraft to determine the empty weight C.G., what must you do with regard to fixed equipment which is normally carried on the aircraft?
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When the empty weight C.G. falls within the empty weight C.G. range, it is unnecessary to perform a weight and balance check if standard loading and seating arrangements are used.
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Why do some manufacturers specify an empty C.G. even though the aircraft is not operated at this empty weight?
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Some aircraft are certified in both normal and utility categories. This means a different maximum allowable gross weight depending on which category the aircraft will be operated in for that day. (2 different useful load calculations)
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Why must the aircraft category be considered when computing weight and balance?
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Metal tubing or flexible hose and fittings
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What are aircraft plumbing lines usually made of?
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By outer diameter and wall thickness. OD is measured fractionally in 16ths of an inch
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How is metal tubing sized?
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Route the fluid lines below the electrical wiring and maintain a clearance of at least 6 inches whenever possible. In no case should they be closer than ½ an inch. both the fluid lines and the wiring should be fastened to the aircraft structure by clamps to ensure seperation
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What precautions should be taken when routing fluid lines adjacent to electrical wiring?
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The stripe is called the lay line and it indicates if the hose has twisted during installation. there is no allowable twist.
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What is the purpose of the identification stripe running along the length of a flexible hose?
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AN fluid lines are either blue or black, while AC fittings are usually gray or Yellow. AN fittings have coarser threads and they have a small shoulder between the threads and the and the flare cone. AC fittings are threaded all the way down to the flare cone.
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How are standard AN type and AC Type fluid line fittings identified?
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37°
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AN fluid line fittings have a flare cone angle of what?
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35°
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AC fluid line fittings have a flare cone angle of what?
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To provide a means of quickly disconnecting a line without a loss of fluid or air entering the system. They are installed at locations where frequent uncoupling of the line is required for inspection/ maintenance.
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What is the purpose of using quick disconnect couplings in fluid systems?
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each half has a valve that is opened when coupled together, and are spring loaded to close when disconnected.
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how does a quick disconnect coupling work?
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By the inside diameter in 16ths of an inch increments.
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How is flexible hose sized?
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5 to 8% of the total hose length must be allowed for freedom of movement under pressure.
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How much slack must be left in a flexible hose during installation?
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The body, the sleeve, and a nut
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What are the 3 parts of a Military Standard (MS) tube fitting?
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The compression sleeve's cut edge will cut deep into the tube and cause the tube to be weakened or crack. Flareless fittings are made up of the tube, the compression sleeve, and nut.
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What will be the result of over tightening a flareless tube fitting?
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A single flare and a double flare
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What are 2 kinds of flares used in aircraft plumbing systems?
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Has better resistance to chemicals and higher strength properties at higher temperatures.
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What is the advantage of flexible Teflon hose over rubber hose?
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Care should be taken that the tubing is not cracked or that the wall thickness is not reduced by the deburring process.
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What precaution should be taken when deburring and inspecting the flared end of a tube?
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The dye penetrant inspection method detects surface cracks with equal success on aluminum, magnesium, brass, copper, and titanium. it can also be used on ceramics, plastics, and glass.
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What is a suitable nondestructive testing method for detecting surface cracks on aluminum castings and forgings?
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1) thoroughly clean the materials surface 2) Apply the penetrant for the specified dwell time. 3) remove the penetrant with water or emulsifying cleaner. 4) dry part 5) Apply the developer 6) inspect the part for results
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List the steps in a dye penetrant inspection.
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1) Thoroughly clean all grease, oil and dirt from the part, part must be of ferrous material ex iron or steel. 2) magnetize the part and then apply the ferromagnetic particles, either held in liquid suspension or in dry powder form, to the area to be inspected. 3)If a discontinuity is present, the magnetized particles will form a pattern in the approximate shape of the discontinuity.
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Briefly describe the procedure for performing a magnetic particle inspection.
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Do not use at joints where either the nut or the bolt are subject to rotation.
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What is the general rule for using self-locking nuts?
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Extra flexible 7 x 19 cable
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What type of cable is used in primary control systems?
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Grip length should be equal the total thickness of the material being bolted together.
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How can the correct "grip length" of a bolt be determined?
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Federal Regulation states that No cable smaller than 1/8 inch in diameter may be used for this purpose.
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What is the smallest cable that can be used in primary control systems?
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25 to 50% of the thickness of the base metal.
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What should be the depth of penetration when making a fillet weld?
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The bead width should be 3-5 times the thickness of the base metal and there should be 100% penetration.
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What should be the width of the weld bead and depth of penetration when making a butt weld?
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They have coded markings on the bolt heads for identification. Bolt diameter is measured in 16ths of an inch and Length in 8ths of an inch increments.
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What system is used to identify AN- type aircraft bolts?
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The alloy must be heated to predetermine temperature, heat soaked for a specific period of time, and then rapidly quenched to a relatively low temperature.
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What are the steps for solution heat treating Aluminum alloys?
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The alloy is in a comparatively soft state, so the material must be naturally aged or precipitation hardened.
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In what state is aluminum alloy immediately after solution heat treating and quenching?
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Rivets are stored in a Refrigerator at a temperature lower than 32°F.
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What is done to prevent certain aluminum alloy rivets (D and DD) from becoming hard after heat treating and quenching?
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Has improper penetration and cold laps caused by the insufficient heat. Appears rough and irregular and it's edges are not feathered into the base metal.
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What are the characteristics of a cold weld?
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Outside micrometer or calipers.
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What tool is used to measure the outside dimensions of shafts, thickness of sheet metal stock, diameter of drills, and for many other similar applications?
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Magnifying glass of at least 10 power, and a flashlight.
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What should be used to do a visual inspection of a weld?
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Standard torque table should be used as a guide whenever specific torque values are not called out in the manufacture procedures.
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How can the correct torque for a bolt be determine?
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Eddy current, dye penetrant, x-ray, coin tap, and visual inspection
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What are the 5 types of NDI tests used on non-ferrous materials?
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If an engine induction fire develops, continue cranking and start the engine, this will suck the fire into the cylinders. If the engine does not start and the fire continues to burn, discontinue starting, and the fire guard should extinguish the fire using a CO2 fire extinguisher.
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What is the procedure for extinguishing an induction system fire that occurs during starting of a reciprocating aircraft engine?
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To detect a hydraulic lock if one is present. Any liquid present in the cylinder will be indcated by an abnormal effort required to rotate the propeller, or by the propeller stopping abruptly during rotation
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What is the purpose of pulling a propeller through by hand for two to three revolutions prior to starting a radial or inverted engine?
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The force can bend or break a connecting rod or permanently damage the cylinder
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What damage is most likely to occur if force is exerted on the crankshaft when there is a liquid lock?
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the word "fuel" and the minimum fuel grade or designation for the engine. Oil filler openings require the word "oil' to be marked at or near the filler cover
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What information must be located on or near fuel filler openings? Oil filler openings?
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For fuels below grade 100, octane numbers are used, such as 91/96. The fuel is compared with mixtures of iso-octane and normal heptane. Thus , grade 91 fuel has the same knock characteristics as a blend of 91 percent octane and 9 percent hexane. When two numbers are used, the firtst number is the lean mixture performance rating, while the second number is the rich mixture performance rating. For fuels above grade 100, the numbers represent the performance rating of the fuel compared to 100 percent Iso-octane. That is, its knock-free power available as compared with that available with pure iso-octane.
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Describe the system used to designate performance rating of aviation gasoline.
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There would be a loss of engine power, efficiency, and possible detonation
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What would be the result of operating an aircraft reciprocating engine using a lower grade of gasoline than that specified for the engine?
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If radio communication is not possible, the light signals may be used for taxi control when an aircraft must be taxied to another part of the airport
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Why should an avaition mechanic know the meaning of the standard light signals which are used by control tower operators?
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The FAA Airman's Information Manual (AIM)
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Which publication lists the standard FAA hand signals a taxi signalman should use?
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When aviation gasoline is mixed with jet fuel, the tetraethyl lead in the gasoline will form deposits on the turbine blades and vanes. Continued use of mixed fuels may cause a loss in engine efficiency. However, there will be no detrimental effect on the engine if such usage is on a limited basis
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What will be the result of mixing aviation gasoline with jet fuel in a turbine engine?
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Gasoline which is contaminated with jet fuel is unsafe for use in a reciprocating engine and can result in complete engine failure
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What may result if gasoline that is contaminated with jet fuel is used in a reciprocating engine?
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The tow tractor brakes and the aircraft brakes should both be used. Use of the brakes should be coordinated by the man in the cockpit.
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When towing an aircraft with a tow tractor, what brakes should be used to stop the aircraft?
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Surface corrosion, dissimilar metal corrosion, intergranular corrosion, stress corrosion, and fretting corrosion
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What are five common forms of corrosion?
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It occurs when two mating surfaces, which are normally at rest with respect to each other, are subjected to slight relative motion. It is characterized by pitting of the surfaces and the generation of large quantities of fine debris between the surfaces. identified by smoking rivets
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What is the cause of fretting corrosion?
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The form of corrosion varies with atmospheric conditions, size and shape of the metal, the type of metal, and the corrosion-producing agents present
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What are the factor which affect the type (form) of corrosion?
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Except on highly stressed steel surfaces (ex. oleo strut) , the use of abrasive papers and compounds, small power buffers and buffing compounds, hard wire brushing and steel wool are all acceptable methods of removing rust
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What methods are used for removing rust from aircraft materials?
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Adequate cleaning, periodic lubrication, detailed inspection, prompt corrosion treatment, touch up of damaged paint, sealing, use of protective covers, and daily wipe-down of exposed critical areas
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What specific operations are part of corrosion-preventative maintenance?
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Clean and strip the corroded area, remove as much corrosion as possible, neutralize any residual material remaining in pits and crevices, restore protective surface films and paint
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Name the steps for corrosion removal.
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Fiber bristle brushes, aluminum wool, and aluminum wire brushes
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What tools are approved for cleaning corroded anodized surfaces?
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A fine spray of kerosene or solvent
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What products should be used to clean an aircraft engine?
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Soap and water
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What is the preferred cleaning agent for plastic surfaces?
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Battery compartments, bilge areas, wheel well and landing gear, flap recesses, lavatory, galley, and other areas where water might be entrapped
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What are the 5 areas of an aircraft that are more prone to corrosion?
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Wet wash cleaning (h20 and an agent) is used to remove oil, grease, carbon deposits and soils, with the exception of corrosion and oxide films. Dry wash cleaning (compressed air or cloth) is used to remove film, dust and small accumulations of dirt
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What is the difference between "wet wash" and "dry wash" aircraft cleaning?
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Light duty cleaning agents are soap and synthetic detergent and heavy duty cleaning agents are solvents and emulsions
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What are types of light duty and heavy duty aircraft cleaning agents?
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Wet the surface before cleaning to prevent scratching.
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What would you do before cleaning a wind screen?
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It looks like threads or worm like puffiness of the painted surface. it occurs between the metals surface, and the protective coating (paint).
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What does filiform corrosion look like and where can it be found?
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A = L×W
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What is the formula for the area of a rectangle?
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Pi is a constant (3.1416) and is the ratio of the circumference to diameter of any circle
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What is PI (π)?
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c=πD
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What is the formula for the circumference of a circle?
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A=πR²
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What is the formula for the area of a circle?
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It is the base number that when multiplied by itself one or more times will produce the given number. root of 4 is 2; 2×2=4
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What is the root of a number?
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4, 9, 16, 64, 100, 144, etc.
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Give examples of perfect square numbers.
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Move the decimal two places to the right and add the percent sign. For example, .75 is 75% or .375 is 37.5%
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How do you express a decimal as a percent?
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Ten to the sixth power or 10^6
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Using the powers of ten, how many 1,000,000 be expressed?
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Subtract the smaller number from the larger number and use the sign of the larger number in the answer. For example -1000 and 5 = 1000-5 = 995 = -995
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What is the sum of a large negative number and a small positive number?
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A ratio may be expressed as a fraction or it may be written using the colon (:) as the symbol for expressing ratio. Thus, the ratio 5/7 may be written 5:7
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How is a ratio expressed?
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multiply the 1st {numerator/denominator }by the 2nd fractions {denominator/numerator}. ex. (a/b) ÷(c/d) = (a/b) x (d/c)
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How do you divide one fraction by another?
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it is the time from the moment an aircraft leaves the surface of the earth until it touches it at the next point of landing
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What is the definition of "time in service" with respect to maintenance time records?
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There must be an entry made in the maintenance records indicating the type and date of the inspection, aircraft time in service, a statement to the effect that the aircraft has been inspected in accordance with 100 hour inspection requirements and was determined to be in airworthy condition, and the signature and certificate number of the person approving the aircraft for return to service
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What are the record requirements for returning an aircraft to service after a 100 hour inspection?
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,the record entries must show the specific number assigned to the AD, the date of compliance, the method of compliance, aircraft time in service, as well as the signature and certificate number of the person who complied with the AD. In addition, the records must show the current status of all applicable Airworthiness Directives, and must include the method of compliance
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What are the record requirements after compliance with an Airworthiness Directive (AD)?
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On an FAA Form 337, which then becomes part of the permanent maintenance records
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Where should the description of a major repair or major alteration be recorded?
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You must give one signed copy to the aircraft owner and send one copy to the FAA Flight Standards District Office in Oklahoma City, Oklahoma
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What is the disposition of the 2 FAA 337 forms after they are completed?
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The appropriately rated and certificated mechanic that performed the work
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Who is required to make the entry in the aircraft records after a 100 hour inspection has been performed?
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Until the work is repeated or superseded by other work or for one year after the 100 hour inspection was performed
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How long must the record of a 100 hour inspection be retained by the owner of operator?
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FAR 43.11
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Where can a mechanic find an example of a 100 hour inspection maintenance record entry?
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FAR's require the records to be transferred to the purchaser at the time of the sale
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When an aircraft is sold, what is done with the aircraft records containing the current status of Airworthiness Directives?
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The entry must name the kind of inspection performed, and a signed and dated list of defects found must be given to the owner. FAR 43.11 a-5
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What type of maintenance record entry is required when an inspection under FAR 91.417 is made to a large airplane or a turbine engine powered multi-engine airplane and defects are found?
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The manufacturer or agency that grants zero time must enter into the records a signed statement of the date the engine was rebuilt, each change made as required by ADs, and each change made in compliance with the manufacturers service bulletins if any entry requested in bulletin.
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What are required entries in a new maintenance record for an engine that has been rebuilt and granted zero time by the manufacturer or by an agency approved by the manufacturer?
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A list of all Airworthy Directives (airframe, engine, propeller and equipment) that pertain to a particular aircraft
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What is an AD summary?
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An update, they are issued bi-weekly
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What are AD frequencies?
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Anything that occupies space and has weight.
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What is matter?
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Solids, liquids, and gas
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What are the three different states of matter?
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14.7 psi or 29.92 inches of Hg (mercury).
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What is the standard atmospheric pressure at sea level?
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A temperature inversion.
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What is the name of the atmospheric phenomenon where cool air is trapped near the earth by warm air?
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662 knots, or 761 mph.
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What is the speed of sound through the air under standard sea level conditions?
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The temperature and pressure acting on it.
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What determines the density of the air? (In other words density altitude.)
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The fulcrum, force of effort, and resistance.
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What are the three basic parts of a lever?
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A first class lever is when the fulcrum is located between the effort and the resistance. An example of a first class lever is a seesaw.
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What is a first class lever, and give an example?
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Force is transmitted equally in all directions because it cannot be compressed.
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In what direction is force transmitted to a confined liquid?
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Force equals pressure times area or F = P x A.
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What is the formula for computing force, pressure, and area?
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Energy in an object created from its movement.
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What is kinetic energy?
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The temperature at which all motion of the atoms will cease entirely in a given sample of gas. it is -273°C
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What is absolute zero?
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Force and movement through a measured distance
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What are the 2 factors involved in work?
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pounds per square inch PSI
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How is pressure expressed in hydraulics and pneumatics?
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conduction, convection and radiation
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What are the three methods of heat transfer
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Rolling, sliding, and static
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What are the three types of friction?
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They are used to notify owners and mechanics of conditions that prevent an aircraft, engine, propeller, or appliance from being in airworthy condition
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What is the purpose of ADs?
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ADs
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What FAA publication is used to notify aircraft owners of unsafe conditions?
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The AD will include the time period necessary for corrective action to be completed
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When must an AD be complied with?
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In the aircraft specifications or type certificate data sheet for that aircraft
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Where can you find a list of approved engines for use in a specific model aircraft?
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FAR Part 23
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Where can you find airworthiness standards for normal, utility, and acrobatic category airplanes?
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FAR Part 25
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Where can you find airworthiness standards for category airplanes?
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FAR Part 21
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What Federal Regulation defines the requirements for the issue of Type Certificates?
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In the aircraft specifications or type certificate data sheet for that aircraft
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Where would you look to find out if a specific airplane can be certified in more than one category?
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Service Bulletins
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What publication is issued by airframe, engine, and compartment manufacturers to notify aircraft owners of design defects?
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The manufacturer's Aircraft Maintenance Manual
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What publication contains complete instructions for maintenance of all systems and components installed in an aircraft?
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Publications containing Non-Regulatory material of interest to the aviation public. ACs prescribe methods of performing certain maintenance and inspection procedures but are only considered ACCEPTABLE data
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What are FAA Advisory Circulars?
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When they are referenced within an AD
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When are Service Bulletins considered mandatory?
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When installing extended range fuel tanks in the baggage or passenger compartment. 1 for the owner, 1 for the FAA within 48 hrs after aircraft approval for return to service, and 1 is placed on board the aircraft
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When would you complete the FAA 337 Form in triplicate?
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FAR Part 65
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Which Federal Regulation prescribes the certificate requirements for a mechanic?
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A mechanic may not calibrate or make any repairs or alterations to the aircraft instruments
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What are the limitations of a certified mechanic in regards to aircraft instruments?
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A powerplant mechanic may make minor repairs and alterations, but may not make major repairs or major alterations to propellers
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What are the privileges and limitations of a certified mechanic in regards to propellers?
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He must notify the Administrator of the FAA in writing or online at www.faa.gov
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When a mechanic has a permanent change of address, what must be done within 30 days after the change?
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It is effective until surrendered, suspended, or revoked
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What is the duration of a certified mechanic?
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120 days
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How long is a temporary mechanic certificate in effect?
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Far Part 43 appendix A
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What is used as a guide to determine if a repair is a major or minor repair?
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A certified mechanic may not exercise the privileges of his certificate and rating unless within the preceding 24 months he has, (for at least 6 months of 24), served as a mechanic under his certificate and rating, or supervised other mechanics, or supervised in a technical capacity, the maintenance or alteration of aircraft, or the administrator (FAA) has found that he is able to do so.
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What are the requirements of recent experience for a mechanic?
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FAR Part 43 Appendix D
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What may be used as a guide for 100 hour inspections?
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A certified A&P may perform a 100 hour inspection and return the aircraft to service by making the proper entries in the maintenance records.
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What are the privileges of a certified mechanic in regard to performing a 100 hour inspection and returning an aircraft to service?
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An A&P with an Inspection Authorization may perform an annual inspection and return it to service
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What are the privileges of a certified mechanic in regard to performing an Annual inspection and returning an aircraft to service
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The aircraft owner or operator
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Who has final responsibility for maintaining aircraft records?
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Yes, under the supervision of a Powerplant mechanic.
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May an airframe mechanic perform maintenance on engines?
