Engine

Question 1

3 major assemblies

Answer 1

Power section
Propeller gearbox
Torquemeter

Question 2

Unique features

Answer 2

2 FADEC
GMAD
NIU

Question 3

Primary purpose of Propeller gearbox

Answer 3

Transmit shaft power from torquemeter to propeller, reduce shaft rpm, provide power to GMAD

Question 4

GMAD provides drive pads for

Answer 4

GOOPH

G: AC Generator
O: Oil pressure pump
O: overspeed governor
P: PCU
H: Hydraulic pump

Question 5

Torquemeter primary function

Answer 5

Transmit engine output to PGB and supply reference to the FADECS

Question 6

Power unit accessory drive (PUAD)

Answer 6

FASSFA

F: FPMU
A: Alternator Stator
S: Starter
S: scavenge pump
F: FCOC
A: Accessory drive sump

Question 7

FCOC

Answer 7

Fuel cooled oil cooler

Question 8

Controlling FADEC is determined by:

Answer 8

1. Engine start with WOW, selection automatically alternates
2. Serious FADEC fault automatic shifts to alternate FADEC
3. ALT selection on control panel

Question 9

NG

Answer 9

Gas generator speed

Question 10

NP

Answer 10

Power turbine speed

Question 11

MGT

Answer 11

Measured gas temperature

Question 12

Engine PMA provides electrical power for the FADEC after engine speed reaches:

Answer 12

40%

Question 13

Propeller speed governing is accomplished by:

Answer 13

Varying blade angle or engine fuel flow

Question 14

Nacelle interface unit (NIU)

Answer 14

1. Provides 1553 & RS422 communications
2. Provides indications of oil temp, px & quantity, oil cooler flap position and fuel flow
3. Controls oil cooler flap and engine/nacelle anti-ice valves
   4.provides engine health & usage monitoring

Question 15

A ___ gallon oil tank located in each ____

Answer 15

20

Nacelle

Question 16

The 20 gallon oil tank has ___ oil capacity with the remaining being air

Answer 16

12 gallon

Question 17

0.66 gallon dedicated reservoir for

Answer 17

Auxiliary feather pump oil supply

Question 18

Oil is gravity fed from tank, through a shutoff valve to:

Answer 18

GMAD/PGB pump & Engine power section pump

Question 19

Oil cooler augmentation supplements normal oil cooling during:

And uses:

Answer 19

Exceeded ground operations

14 stage bleed air when the per levers are below flight idle

Question 20

Oil cooler augmentation is operating when:

Answer 20

1.Oil cooler flap position is greater than 80%
2. Oil temp is above 80 C
3. Airspeed less than 50 knots
4. Pwr levers less than flight idle
5. Weight on wheels

Question 21

ACAWS alerts If oil cooler augmentation system fails on

Answer 21

Caution!

Damage to the oil cooler flap occurs unless the crew opens the cooler flap full open

Question 22

Starting system consists of

Answer 22

Air turbine starter and starter regulating and shutoff valve

Question 23

Engines started using a combination of

Answer 23

Electrical power and low pressure bleed air

Question 24

Min bleed air pressure for start

Answer 24

22 PSI

Question 25

For start MGT must be below

Answer 25

175 C

Question 26

During start: At 14% NG

Answer 26

The FADEC arms the fuel ignition circuits 4 sec later, ignition is energized and shutoff valve opens to start fuel flow Normal time from light up to stabilized NG is 20-25 sec

Question 27

Starter cutout occurs at

Answer 27

65% NG

Question 28

Time from starter switch select to NP on speed

Answer 28

30 sec

Question 29

After motor, wait ___ after NG reaches __

Answer 29

30 sec 0

Question 30

On the ground, AUTO mode opens the oil cooler flap when the oil cooler outlet temp is greater than

Answer 30

75 C And retracts flap when temp is less than 60

Question 31

Coolest oil temperature is achieved when flap is

Answer 31

100 percent open

Question 32

In air with gear extended, AUTO mode opens oil cooler flap when temp is greater than ___ and retracts when temp is less than ___

Answer 32

82 76

Question 33

In flight, with gear retracted, AUTO mode:

Answer 33

Closes oil cooler flap for optimum in flight cooling

Question 34

PMA

Answer 34

Permanent magnet alternator

Question 35

PMA powers

Answer 35

FADEC and engine exciters

Question 36

Starter duty cycle

Answer 36

70 sec cycle, 5 cycle max then 20 min cooldown

Question 37

On start: NG in EPSI GPSI

Answer 37

10 sec for NG EPSI 15 sec after NG GPSI 15 sec after NP

Question 38

Pulling fire handle (9 things)

Answer 38

1. Nacelle shutoff valve closed 2. Engine oil shutoff valve closed 3. Extinguishing AGENT switching avail 4.Fire extinguisher directional control valves positioned 5.firewall shutoff valve closed 6.firewall hydraulic shutoff valves are closed 7.BAU commands prop aux feather pump for 20sec 8. Data bus message sent to FADEC to feather prop and shut down engine 9. Shutoff valve in the engine FPMU, backup power 1/4 is utility battery; 2/3 is avionics battery