Flight Controls And Hydraulics Flashcards

1
Q

Define DASH

A

Differential Airspeed Hold

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2
Q

Define ILCA

A

Integrated Lower Control Actuators

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3
Q

Define CCDA

A

Cockpit Control Driver Actuator

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4
Q

Define CPT

A

Control Position Transducer

provides position and rate-of-change information to CAAS

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5
Q

Define DCP

A

Differential Collective Pitch

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6
Q

What component improves control feel by reducing control sensitivity?

A

Viscous damper

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7
Q

How many flight Control Hydraulic Systems does the CH 47 have?

A

2

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8
Q

When can the Hydraulic Service Module be used to add fluid to the hydraulic systems?

A

Anytime

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9
Q

What is the purpose and location of the #1And #2Flight Hydraulic Reservoir/Coolers And Fans?

A

FWD & AFT pylons, cool and store excess hydraulic fluid

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10
Q

What is the purpose and location of the #1And #2 Flight Hydraulic Pumps?

A

1- right side of FWD XMSN

#2- left side of AFT XMSN

keeps fluid pressurized in their respective system, each pump pressurizes half of both upper dual boost actuators on the FWD and AFT rotor systems

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11
Q

What is the purpose and location of the #1And #2 Flight Hydraulic power control modules?

A

FWD & AFT Pylon/Controls pressurized and return fluid for their respective systems

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12
Q

The lower control pressure control modules (LCPCMs) reduce pressure from ______ psi to ______psi for the operation of the____________.

A

3,000 psi
1,500 psi
ILCAs

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13
Q

What must be done if a jam indicator is found extended on preflight?

A

Contact maintenance

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14
Q

What is the purpose and location of the upper dual boost actuators?

A

Underneath the Forward and aft swashplates, transmit input into the swashplates (pivoting and swiveling UDBA)

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15
Q

What are the two sides of a PTU and what are their purpose?

A

Utility hydraulic side and flight hydraulic side

allow utility hydraulic system to pressurize flight hydraulic system

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16
Q

When will the flight hydraulic pumps provide hydraulic pressure to the system?

A

When the rotors are turning

17
Q

What are the two drains on the flight hydraulic pumps and the purpose of each?

A

Seal drain- allows fluid to drain if a leak develops from either the transmission or the pump

Case drain-cooling and lubrication (1 gallon per minute, fault at 2.5 gallons per minute)

18
Q

What does the HYD 1 or HYD2 FLT CONTR caution indicate?

A

A loss of pressure and/or fluid in the respective hydraulic system

19
Q

If the HYD FLT CONTR caution is active, what other caution will also be active?

A

Associated AFCS caution

20
Q

The No.1 and No.2 flight hydraulic systems are identical. They are _________ in operation, ________ separated, and __________ integrated.

A

Parallel in operation, hydraulically separated, and electronically integrated

21
Q

Where are the accumulators for the No 1. And No 2. Flight Hydraulic Control Systems located?

What do they do?

A

They are located on the pressure control modules for their respective systems, in between the return filter and pressure filter.

They dampen low frequency pressure surges and provide stored hydraulic power for peak loads.

22
Q

What hydraulic psi is supplied by the engine starter system for normal engine starts?

A

3,350 psi

(3,000 psi from the utility hydraulic pump is sufficient in other than normal conditions)

23
Q
A

Power Control Module

24
Q
A

ILCA Manifold

25
Q
A

Power Transfer Unit

26
Q
A

Flight Hydraulic Pump

27
Q
A

Lower Control Pressure Control Module

28
Q
A

Integrated Lower Control Actuators

29
Q
A

First Stage Mixing Unit

30
Q
A

Second Stage Mixing Unit