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The engine cowling does all of the following except ______.
the engine to the frame
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The purpose of the inertial separator is to ______.
keep debris away from the engine
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The compressor and power turbines are physically connected.
False
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What three elements are necessary for engine operation?
Air, fuel, heat
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T or F; As exhaust is released, additional thrust is provided.
True
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T or F; Once the engine is started, and the ignition switch is in the ON position, igniters are automatically
energized and de-energized by the PMU.
False; on = continuous ignition
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The primary purpose of the ignition system is to ______.
ignite the air and fuel mixture in the combustion chamber
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T or F; Friction control settings made to the front PCL affect the aft PCL.
True
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When starting the T-6A, the PCL should be ______.
pushed forward until a green ST READY annunciator is illuminated
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The PMU is located ______.
underneath the engine, in the accessory compartment
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The PMU performs the following functions:
processes power request and keeps engine and propeller within operating limitations
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The PMU STATUS annunciator illuminates after landing when the PMU ______.
needs maintenance
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T or F; After engine start, the starter becomes a generator.
True
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T or F; The MANUAL starter switch position will be used under normal circumstances.
False; AUTO/RESET for normal circumstances
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If oil pressure is ______ psi or below at IDLE power, the red OIL PX annunciator will illuminate.
15
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If oil pressure remains between 15 and 40 psi at IDLE power for more than 5 seconds, ______ will be
illuminated.
the red OIL PX annunciator
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The chip detector sensor is located ______.
in the reduction gearbox
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The oil system provides filtered oil to all of the following systems, EXCEPT ______.
wheel brakes
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The reduction gearbox reduces engine output from ______ RPM to propeller speeds of ______ RPM.
30,000; 2000
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The phase shift torque probe monitors ______.
propeller speed
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The PIU ______.
regulates oil pressure to the pitch change mechanism
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If the propeller pitch change mechanism loses oil pressure, the propeller will automatically move
towards the ______ position.
feathered
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Varying levels of thrust are achieved by ______.
changing propeller pitch
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The PMU ______.
keeps the engine and propeller within operating limits
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If the oil filter gets clogged _____.
the system uses unfiltered oil
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In straight-and-level flight, for PCL positions above IDLE, oil pressure should be maintained between
______ and ______.
90; 120 psi
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The phase shift torque probe is located ______.
in the reduction gearbox
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Propeller pitch refers to ______.
the angle of the propeller blades
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Which propeller position produces the least amount of drag?
Feather
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The propeller pitch change mechanism is able to change propeller blade angle by ______.
oil pressure
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The PMU directs the PIU to maintain propeller RPM at ______.
2000
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The power turbine is driven by ______.
expanding gases
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During aerobatic flight, oil pressure should be maintained at or above ______.
40 psi
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Amber PMU STATUS
- On ground: fault
- Flight: mistmatch between weight on wheels switches, will not revert to ground mode upon landing
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red PMU FAIL
amber PMU STATUS
PMU is not functional
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PMU power
permanent magnet alternator; 32 VAC PMU converts DC; PMA fails, 28 VDC battery bus
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Starter/ Generator provides
28 VDC power; charges 24 VDC battery
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amber OIL PX
- Idle: 15-40psi or
- 40-90psi for 10sec above Idle
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red OIL PX
- Idle: <15psi
- Idle: <15-40psi for 5sec or more
- above idle: <40psi
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100% torque is available for sea level to ___
12,000-16,000 MSL
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Overspeed governor will not allow propeller RPM to exceed _____%/ _____RPM
106%; 2120 RPM
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