Engines

Question 1

The helicopter is power by what kind of engines?

Answer 1

Two Pratt and Whitney T400-CP400 turboshaft engines.

Question 2

Engine SHP ratings?

Answer 2

Flat-rated: 1070
Max continous each engine: 916
Somtimes listed at: 900 Because CGB is only capable of accepting: 1800 SHP

Question 3

Engine compressor design?

Answer 3

Three stage axial, single stage centrifugal

Question 4

What type of combustion chamber?

Answer 4

Annular

Question 5

Engine air management system does what?

Answer 5

Provides the engine that is free of ice, dust, and other foreign particles.

Question 6

Low engine RPM light illuminates when Ng drops below?

Answer 6

52 +/- 2%

Question 7

Acruation of the ___ will close the particle separator door, regardless of switch position.

Answer 7

FIRE PULL HANDLE

Question 8

The oil-to-fuel heat exhangers are located on?

Answer 8

The front face of each accessory gearbox.

Question 9

The oil-to-fuel heat exhanger maintains fuel temperature of atleast?

Answer 9

5 degrees C at the inlet to puel pump.

Question 10

Above __, a wax filled bellows actuated valve cuts off supply of oil to thw heat exhanger.

Answer 10

32 degrees C.

Question 11

Each engine has an automatic and maunal __.

Answer 11

Fuel control unit.

Question 12

The Power Turnine(Nf) Govenor is mounted where?

Answer 12

On the CGB and driven by its respective engine.

Question 13

Under normal conditions the Nf is controlled by what?

Answer 13

Nf govenor.

Question 14

Droop is defined as what?

Answer 14

Decrease in Power Turbine (Nf) speed as power is increased.

Question 15

Without the droop compensator the engine govenor system is as much as?

Answer 15

12% RPM (no load to full power)

Question 16

A properly rigged droop compensator will maintain Nf RPM to what?

Answer 16

+/- 1% from flat pitch to climbout power.

Question 17

If binding occurs in the droop compensator?

Answer 17

A rivet in the collective linkage is desinged to shear, allowing unhindered operation of the collective control.

Question 18

Torque Control Unit

Answer 18

A single torque control unit is mounted on the CGB.

Question 19

What does the TCU do?

Answer 19

Recieves torquemeter oil pressure signals proportinal to the torque outputs of the two engines.

Question 20

If an over torque condition is imminent:

Answer 20

Pneumatic signals are sent to both AFCUs to reduce fuel flow and thusbreduce torque. Limiter setting range is 102 to 104% of transmission torque.

Question 21

How many oil debris detection systems (ODDS)?

Answer 21

5

Question 22

Where are the ODDS

Answer 22

1 in engine, 1 in CGB, 1 in transmission, 1 in 42 and 1 in 90 degree gearboxes.