Engines

Question 1

On which side of the AH-64 is ENG1 located?

Answer 1

Left Side

Question 2

Engine rotation direction is to the 3 o’clock position. is that clockwise or counter clockwise (aft looking forward)?

Answer 2

Clockwise

Question 3

Output power of the 701D has maximum continuous shaft horsepower (SHP) of 1716. True or false?

Answer 3

True

Question 4

primary engine mounts will support the engine and take up to the vertical and side loads, but will the secondary mounts support the engine if a primary mount should fail?

Answer 4

Yea

Question 5

name the four engine modules

Answer 5

Cold section, hot section, power turbine section, and accessory section

Question 6

The ATS serves what purpose

Answer 6

The air turbine starter rotates the compressor through the accessory section module until the engine reaches an NG speed that permits the engine to be self-sustaining

Question 7

What is the purpose of the radial drive shaft?

Answer 7

it turns the engine compressor section during starting from the ATS and drives the accessory section when the engine is operating

Question 8

The GE-701D engine cold section module is designed to do what?

Answer 8

cleans, directs and compress, the air moving into the engine 

Question 9

what does the engine fuel system provide to the engine? 

Answer 9

pressurized, filtered fuel in the required amounts for the combustion under varying power demands. 

Question 10

The fuel boost pump is an engine-driven non-self–priming suction and pressure pump, which ensures negative pressure. Why?

Answer 10

to reduce fire hazard in case of fuel system damage.

Question 11

when engine fuel pressure drops below 9.0 psi, the pressure switch closes, and the MP receives a complete circuit signal. The MP will send a caution message to the EUFD and then signal to display a message on the MPD. Will this illuminate the MSTR CAUT push button and caution tone (beetle – beetle)?

Answer 11

Yes. all that for the answer just to be yes. 🙃

Question 12

which occurs first, the red indicator button popping on the fuel filter housing or the EUFD message FUEL 1 BYPASS?

Answer 12

fuel filter housing red indicator button popping (impending bypass.)

Question 13

The CHMU provides mechanical Ng over speed protection to the engine at what percent Ng?

Answer 13

110% +/- 2 NG

Question 14

The ODV receives an electrical signal from the EDECU when an NP over speed exists, opening the over speed solenoid valve, which stops fuel flow to the injectors (causing flame out). At what NP speed does this occur?

Answer 14

118.1 +/- 1% NP

Question 15

The engine oil filter has an impending bypass indicator that will cause a red indicator button to pop out when differential pressure across the filter reaches 40-60 PSID. Will this send a signal to the MP?

Answer 15

No. This condition will normally be found during pre or post flight inspection.

Question 16

what protects the engine lubrication system from Excessive pressure during initial starts?

Answer 16

Cold oil relief valve

Question 17

The oil pressure transmitter is responsible for sending a low oil pressure signal to the MP. When the MP receives the signal, what is the engine oil pressure?

Answer 17

Below 20-25 psi

Question 18

emergency lubrication for the number 1, 2, 3, and 4 bearings is provided by oil misting from jets, using reservoirs in A and B sumps. Does the C sump provide any emergency lubrication? 

Answer 18

No

Question 19

how long is emergency oil lubrication provided when NG is 75%?

Answer 19

Approximately 30 seconds

Question 20

is the engine chip detector, fuzz,-burning, or non-fuzz-burning?

Answer 20

It is non-fuzz-burning

Question 21

following a complete failure of an alternator, operation of the corresponding engine, and all indications from engine instruments will be normal. What indication will be lost, will activate the MSTR WARN light, ENGINE 1 or ENGINE 2 OUT voice and EUFD messages?

Answer 21

The NG indications

Question 22

how is the engine anti-ice/start bleeder valve mechanically controlled?

Answer 22

by the CHMU during starts through the same linkage that positions the Inlet Guide Vanes (IGV) and variable-geometry stator vanes. It opens and closes at different NG speeds dependent upon ambient air temperature.

Question 23

once the engine is self-sustained during the start process, are the igniter plugs used anymore prior to engine shut down?

Answer 23

No

Question 24

where does the thermocouple harness assembly measure the temperature of the gases for the engine?

Answer 24

at the power turbine inlet.

Question 25

In the event of an air frame electrical system failure what position will the anti-Ice/start bleed valve be in?

Answer 25

Open

Question 26

how many volts AC does the engine driven alternator provide the engine electrical system?

Answer 26

115VAC

Question 27

which power lever quadrant requires electrical power (BATT or EXT PWR) to manipulate engine power levers?

Answer 27

CPG power quadrant

Question 28

when a power lever is advanced into LOCKOUT, what automatic features are lost?

Answer 28

NP governing and TGT limiting

Question 29

what is the ignition override switch (IGN ORIDE position) used for?

Answer 29

The switch is discrete and will be used to abort automatic start sequence or disengage the ATS output shaft, if the sprag clutch fails to disengage

Question 30

what are the Power Available Spindle (PAS) and the Load Demand Spindle (LDS) on the CHMU attached to in the crew stations?

Answer 30

The PAS is attached to the pilots, power levers, and the LDS is connected to the collective servos bell crank.

Question 31

what happens to both engines when the engine chop button is pressed?

Answer 31

The NP reference is removed, the engines will immediately decelerate to idle speed, and an ENG CHOP warning message will appear on the EUFD and a voice message will announce “engine chop”

Question 32

The MPD ENG page displays what three formats?

Answer 32

ground, flight, and emergency format

Question 33

what two status windows (only one at a time) may appear in the upper right of the flight format when associated systems are outside normal operating ranges?

Answer 33

Engine oil pressures and hydraulic system pressures

Question 34

which status window of the two (Engine Oil Pressure or Hydraulic System status window) has priority when both systems are out of limits?

Answer 34

hydraulic system status window

Question 35

when the ENG page auto pages to emergency format in response to an active warning, how do you revert back to flight format?

Answer 35

acknowledge button (ACK, B4.)

Question 36

what engine parameters utilize the countdown timer feature?

Answer 36

Torque, TGT, NP, and NG

Question 37

what are the two types of engine HIT checks that can be performed?

Answer 37

Auto or manual

Question 38

how can you prevent the ECS from automatically activating the heating mode?

Answer 38

By De-selecting bleed air
1 and 2 on the A/C-Util page

Question 39

When checking the baseline page, you find that the values are different from those annotated on the HIT log. What should be done?

Answer 39

enter the values found in the aircraft logbook via the keyboard unit

Question 40

when the TGT margin is within_______ degrees or less of the table TGT limit, a write up on the DA form 2408–13 is required.

Answer 40

5°C

Question 41

what does it indicate when the TGT values are getting closer to the established limits?

Answer 41

Engine performance degradation

Question 42

3 functions of the ODV

Answer 42

Start switch, commands ODV open to allow fuel to injectors
Power levers off ODV is commanded closed to stop fuel flow
Commanded closed when hitting 118+/-1 NP