SY103 Flashcards

1
Q

Accessory Compartment contains:

A

accessory gearbox, starter, oil tank, and battery

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2
Q

Gas Generation section contains:

A

compressor inlet, compressor, combustion chamber, and compressor turbine

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3
Q

Explain Gas Generation flow

A

Inlet air enters the engine through the compressor inlet and is compressed by a four-stage axial flow compressor and a single stage centrifugal flow compressor. The compressed air is transferred to the combustion chamber. In the combustion chamber the compressed air is mixed with fuel and ignited. Igniting the mixture causes the gases to expand. The expanding gases drive the compressor turbine, which perpetuates the cycle.

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4
Q

Power Turbine section contains:

A

power turbines, exhaust case, reduction gearbox, and the propeller shaft

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5
Q

Elements necessary for engine operation

A

air, fuel, and heat

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6
Q

Engine exhaust system contains

A

exhaust ports and exhaust stacks

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7
Q

The starter provides

A

initial air flow

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8
Q

The fuel management unit (FMU) provides

A

fuel

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9
Q

The ignition system provides

A

the initial heat source

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10
Q

The ignition system consists of

A

an ignition exciter, two high voltage igniter cables, and two spark igniters.

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11
Q

PMU automatically maintains

A

Interstage Turbine Temperature (ITT), torque, and RPM limitations (N1 and NP)

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12
Q

Primary power source for the PMU is the

A

Permanent Magnet Alternator (PMA), mounted on the reduction gearbox

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13
Q

The PMU is located

A

underneath the engine, in the accessory compartment

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14
Q

The oil system provides a steady flow of filtered oil to

A

the engine bearings, reduction gears, accessory drives, and the propeller.

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15
Q

The oil system contains

A

a pressure system, scavenge system, and cooling system.

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16
Q

The chip detector sensor

A

detects metallic particles in the oil and warns the pilot of possible gear damage.

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17
Q

Oil level must be serviced within

A

30 minutes of engine shutdown.

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18
Q

Normal oil pressure

A

90 to 120 PSI

19
Q

Aerobatic oil pressure

A

40 to 130 PSI

20
Q

Amber Oil PX

PCL-Idle

A

Oil Pressure between 15 and 40 sec

Time delay: None

21
Q

Red Oil PX, Amber Oil PX

PCL-Idle

A

Oil Pressure between 15 and 40 Sec

Time delay: 5 sec or more

22
Q

Red Oil PX

PCL-Idle

A

Oil Pressure below 15 sec

Time delay: None

23
Q

Amber Oil PX

PCL- Above Idle

A

Oil Pressure between 40 and 90 PSI

Time delay: 10 sec

24
Q

Red Oil PX

PCL-Above Idle

A

Oil Pressure 40 PSI or below

Time delay: None

25
Q

Chip detector sensor is located

A

in the reduction gearbox

26
Q

T-6A uses what kind of propellor?

A

four blade, variable pitch, constant speed propeller.

27
Q

Reduction gearbox RPM converstion

A

From 30,000 RPM to 2,000 RPM

28
Q

Propeller speed (Np) is measured by

A

phase shift torque probe located in the reduction gearbox.

29
Q

Propeller blade angle conditions based on

A

measure of the angle between the plane of rotation of the propeller and the chord line of the blade.

30
Q

Feathered propeller oil

A

No oil pressure

31
Q

Low (flat or fine) propeller oil

A

Max oil pressure

32
Q

Propeller Interface Unit (PIU) does what?

A

responds to power requests from the PMU by regulating oil pressure to the pitch change mechanism. The PIU increases the pressure of the oil accordingly.

33
Q

Engine cowling does what?

A

Protects the engine components.
Decreases drag.
Includes an air inlet to the engine.

34
Q

The purpose of the inertial separator is to

A

keep debris away from the engine.

35
Q

What three elements are necessary for engine operation?

A

Air, fuel, and heat

36
Q

T or F: Once the engine is started and the ignition switch is on the ON positions, igniters are automatically energized and de-energized by the PMU.

A

True

37
Q

The primary purpose of the ignition system is to

A

ignite the air and fuel mixture in the combustion chamber.

38
Q

When starting the T-6A, the PCL should be

A

pushed forward until a green ST READY annunciator is illuminated.

39
Q

The PMU is located

A

underneath the engine, in the accessory compartment.

40
Q

THE PMU performs the following functions

A

maintains operating limits, processes power requests, and determines available power.

41
Q

The PMU STATUS annunciator illuminates after landing when the PMU

A

needs maintenance.

42
Q

The chip detector sensor is located in

A

the reduction gearbox.

43
Q

The phase shift torque probe monitors

A

propeller speed.