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SYSTEMS > ENG > Flashcards

ENG Flashcards

1
Q

On which side of the AH-64E is ENG 1 located?

A

Left side

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2
Q

Engine rotation direction is to the 3 o’ clock position. Is that clockwise or counterclockwise (AFT LOOKING FORWARD)?

A

Clockwise

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3
Q

Output power of the -701D has Maximum Continuous Shaft Horse Power (SHP) of 1,716. True or False?

A

True

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4
Q

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

A

Yes

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5
Q

Name the four engine modules

A

Cold section
Hot section
Power turbine section
Accessory section

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6
Q

The ATS serves what purpose?

A

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

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7
Q

What is the purpose of the radial driveshaft?

A

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

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8
Q

What is the purpose of the IPS?

A

It provides separation of foreign particles from the inlet airflow to protect the engine from erosion and damage

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9
Q

What does the engine Fuel system provide to the engine?

A

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

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10
Q

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

A

To reduce fire hazard in case of Fuel System damage

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11
Q

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 pushbutton and caution tone (Beetle-beetle)?

A

Yes

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12
Q

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

A

Fuel filter housing red indicator button popping (impeding bypass)

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13
Q

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

A

110% +/- 2 Ng

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14
Q

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

A

118% +/- 1 Np

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15
Q

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

A

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

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16
Q

What protects the engine lubrication system from excessive pressure during initial starts?

A

Cold oil relief valve

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17
Q

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

A

Below 20-25 PSI

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18
Q

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

A

No

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19
Q

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

A

No

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20
Q

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

A

No

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21
Q

How long is emergency oil lubrication provided when Ng is 75%?

A

Approximately 30 seconds

22
Q

Is the engine chip detector fuzz-burning or non-fuzz-burning?

A

Non-fuzz-burning

23
Q

Is the engine chip detector fuzz-burning or non-fuzz-burning?

A

Non-fuzz-burning

24
Q

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?

A

The Ng indications

25
Q

Once the engine is self-sustained during the start process, are the igniter plugs used any more prior to engine shutdown?

A

No

26
Q

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

A

At the power turbine inlet

27
Q

In the event of an airframe electrical system failure, what position will the anti-ice/start bleed valve be in?

A

Open

28
Q

How many Volts AC does the engine-driven alternator provide for the engine electrical system?

A

115 VAC

29
Q

Which power level quadrant requires electrical power (BATT or EXT PWR) to manipulate engine power levers?

A

CPG power quadrant

30
Q

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

A

Np governing and TGT limiting

31
Q

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

A

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

32
Q

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

A

The PAS is attached to the pilots power levers, and the LDS is connected to the collective servo’s bell crank

33
Q

What happens to both engines when the engine chop is pressed?

A

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

34
Q

The MPD ENG page displays what three formats?

A

Ground, Flight, and Emergency format

35
Q

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

A

Engine oil pressure and hydraulic system pressures

36
Q

Which status window of the two has priority when both systems are out of limits?

A

Hydraulic systems status window

37
Q

When the ENG page auto pages to emergency format in response to an active Warning, how to you revert back to Flight format?

A

Acknowledge button (ACK, B4)

38
Q

What engine parameters utilize the count-down timer feature?

A

Torque, TGT, and Ng

39
Q

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

A

Auto or Manual

40
Q

How can you prevent the ECS from automatically activating the Heating mode?

A

By de-selecting BLEED AIR 1 and 2 on the A/C-UTIL page

41
Q

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

A

Enter the values found in the aircraft log book via the Keyboard Unit (KU)

42
Q

When the TGT margin is within_______degree s or less of the table TGT, a write-up on the DA Form 2508-13 is required

A

5 degree C

43
Q

What does it indicate when the TGT values are getting close to the established limits?

A

Engine performance degradation

44
Q

Accessory Section components:

A

-CHMU
-Fuel boost pump
-Oil filter
-Oil cooler
-Alternator
-Oil lube and scavenge pump
-Inlet particle separator
-Fuel filter assembly
-Chip detector
-Oil/fuel filter bypass sensors
-Oil/fuel pressure sensors
-Overspeed and drain valve (ODV)
-Air turbine starter (ATS)

45
Q

What is the Hot Start Prevention and what does it do?

A

Its a part of the EDECU and prevents overtemperature during engine start by activating a solenoid in the overspeed drain valve when Np and Ng are below their respective hot start reference and TGT exceeds 900 degrees C. This shuts off fuel flow and causes the engine to shut down.

46
Q

What is the MTRA? What does it do?

A

Maximum Torque Rate Attenuator: reduces fuel flow and limits rate of torque increase to approximately 12% per second when transient engine torque exceeds 100% during an uncompensated maneuver

47
Q

What is the TDI? What does it do?

A

Transient Droop Improvement Circuit: Prevents Nr droop during collective applications by increasing Nr if rapid collective is applied without continued demand being placed on the rotor system from a torque setting of less than or equal to 12% tq DE on TDI

48
Q

When will dual engine contingency be activated?

A

When Np is less than or equal to 97% or Np is decelerating at 5% per sec or greater. Either condition met will increase the normal dual engine TGT limiter setting to 903

49
Q

When is dual engine contingency power deactivated?

A

When Np recovers to greater than or equal to 99.5% and TGT is less than 879, TGT limiter resets to normal in one second

50
Q

How does the Np Overspeed Protection System work?

A

If Np meets or exceeds 118.1 plus or minus 1%, two frequency sensing circuits output a signal to the overspeed system causing the ODV to shutoff fuel flow to the engine

51
Q
A

SYSTEMS (13 decks)

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