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CH-47F 9.4 Bham > Utility Hydraulics > Flashcards

Utility Hydraulics Flashcards

1
Q

What is the purpose of the utility hydraulic system?

A

To provide hydraulic pressure to operate sub systems for ground operations and some emergencies

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2
Q

What are the sub systems that are operated by the utility hydraulic system?

A

-Power transfer units
-APU starting System
-Engine starter System
-cargo ramp
-power steering
-swivel locks
-wheel brakes
-center cargo hook
-cargo winch

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3
Q

What are the 17 major components in the utility hydraulic system?

A

-Hydraulic service module
-Utility reservoir/cooler assembly
-Utility Reservoir pressurization accumulator
-Utility system hand pump
-Electric pump for the utility system Hydraulic accumulator(EPUSHA)
-APU start accumulator
-APU motor/pump
-APU start module
-utility hydraulic aft transmission driven pump
-PTU’s
-AGPU (auxiliary ground power unit)
-utility hydraulic pressure control module
- utility hydraulic return control module
-brake accumulator
-power steering module
-utility hydraulic control panels
-maintenance panel

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4
Q

What are the four sources of pressure for the utility hydraulic system?

A

-APU start accumulator
-APU motor/pump
-utility hydraulic system pump
-auxiliary ground power unit

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5
Q

What could happen if the fluid level is allowed to go below the sight glass while using the fill module?

A

Air could get into the system

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6
Q

When should the pilot use the utility reservoir depressurization Valve?

A

NEVER

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7
Q

EPUSHA operations should not exceed……

A

5 times during start

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8
Q

When will the APU be used during flight?

A

Only during emergencies

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9
Q

What component provides the utility hydraulic system Pressure In Flight, under normal conditions?

A

Utility hydraulic system aft transmission pump

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10
Q

Identify the five accumulators in the utility hydraulic system

A

-APU start accumulator
-APU start module accumulator
-PWR steering accumulator
-Brake accumulator
-Utility reservoir pressurization accumulator

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11
Q

How many pumps pressurize the utility hydraulic system, what are they

A

2
Utility hydraulic pump
APU motor pump

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12
Q
A

Hydraulic Service Module

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13
Q
A

Utility Reservoir Cooler

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14
Q
A

Utility Reservoir Depressurization Valve

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15
Q
A

Return Control Module

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16
Q
A

Power Control Module

CH-47F 9.4 Bham (48 decks)

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