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CH-47 (9.4) > Powertrain > Flashcards

Powertrain Flashcards

1
Q

Which transmissions do not have auxiliary lubrication system?

A

Engine XSMN

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2
Q

How can you identify low oil pressure in the aft vertical shaft?

A

Maintenance Panel and WCA

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3
Q

What indications will the crew have when a debris screen is bridged with conductive particles?

A

Debris indication on EICAS, Maintenance Panel, and WCA

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4
Q

The _____ lubrication system lubricates the main generators.

A

AFT XSMN Main

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5
Q

What should you do if you find an engine or combining transmission oil quantity indication low and the aircraft has been shutdown for more than 30 minutes?

A

5 min Ground Test then recheck

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6
Q

What is the purpose of the 9 and 4 degree tilt in the fwd and aft transmissions?

A

Aids in Ground Handling and Ground Taxiing.

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7
Q

What is the location of the temperature/thermal switch that turns on the ENG 1 or ENG 2 XSMN warning?

A

Bottom of the ENG XSMN

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8
Q

The fluid levels in the combining and engine transmissions should be checked within ____ minutes after engine shutdown.

A

30

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9
Q

Why must you reduce the electrical load if the AFT XSMN OIL HOT caution light is active?

A

Aft XSMN main lubrication system lubricates and cools generators

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10
Q

What will happen if the maintenance panel is tested in-flight?

A

Same as ground

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11
Q

What is the emergency procedure for the ENG1 or ENG2 XSMN warning active?

A

-EMER ENG SHUTDOWN

-[F] Affected ENG XMSN- Check

LAND AS SOON AS POSSIBLE

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12
Q

How many synchronizing drive shafts are installed on the CH-47?

A

9 (7 FWD,2 AFT)

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13
Q

Exceeding VNE with the LCT retracted places excessive stress on what component?

A

Thrust Bearing

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14
Q

What items in the drive-train system allows the shaft assemblies to flex?

A

Layered Steel Plates
(Flex-couplings)

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15
Q

What reduces vibrations between drive shafts and the aircraft?

A

Lord Mounts

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16
Q

The quill shafts are located where?

A

Between the engines and their repsective transmissions

17
Q

What is displayed if the pressure in an ENG XMSN is greater than 90 psi?

A

ENG1 or ENG2 XSMN PRESS HI advisory

18
Q

What temperature does the ENG1, ENG2, FWD, COMB, and AFT XSMN OIL HOT cautions become active?

A

140 deg C

19
Q

Where is the cooling air drawn in through for the FWD XMSN oil cooler?

A

Air inlet duct around the synchronizing shaft on the rear of the FWD XMSN

20
Q

What is the purpose of the Power Train system?

A

To transmit the power from the engines to the rotors

21
Q

What temperature does the ENG1 or ENG2 XSMN warning become active?

A

190 deg C

22
Q

How many transmission are in the Power Train system?

A

5

23
Q

When the engine transmission filter differential pressure indicator extends, can the button be reset at the time?

A

No

24
Q

When the COMB XSMN OIL HOT caution is displayed, how is the POWER TRAIN page temperature indication displayed?

A

Red

25
Q

The left oil pump on the combining XSMN is used for which transmissions?

A

COMB XSMN main system and the #1 ENG XSMN

26
Q

At what psi does the maintenance panel MAIN PRESS LO indicator illuminate?

A

When pressure drops below 20 psi

27
Q

What drives the forward XMSN oil cooler fan?

A

Transmission driven

28
Q

What automatically eliminates nuisance chip indicator lights caused by minute particles in the transmission oil system?

A

Fuzz Burn-off System

29
Q

The aft transmission cooler is located where?

A

Rear of the AFT XSMN (shaft driven fan)

30
Q

The AFT XSMN main filter bypass visual indicator must be installed how?

A

Within 30 deg of vertical, and at the top of the filter housing

31
Q

What components are NOT lubricated by the aft transmission auxiliary lubrication system?

A

Generators and aft shaft

32
Q

Describe the combining transmission lubrication system.

A

Consists of a left and right pump.

Left-lubricates Eng 1 XMSN and serves as primary lubrication for COMB XMSN

Right- lubricates Eng 2 XMSN and serves as auxiliary lubrication for COMB XMSN. The right pump assembly is not routed through a cooler

CH-47 (9.4) (48 decks)

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