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x. ORAL STUDY GUIDE - 737NG > HYDRAULICS > Flashcards

HYDRAULICS Flashcards

1
Q
  1. What does an illuminated STBY HYD LOW QUANTITY light indicate?
A

 Low quantity (illuminates at approx 50%)

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2
Q
  1. Is this STBY HYD LOW QUANTITY light always armed?
A

 Yes

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3
Q
  1. What does an illuminated STBY HYD LOW PRESSURE light indicate?
A

 Low pressure

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4
Q
  1. Is the STBY HDY LOW PRESSURE light always armed?
A

 No

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5
Q
  1. When is the STBY HDY LOW PRESSURE light armed?
A

 When the standby system is armed or operating

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6
Q
  1. What does an illuminated STBY RUD ON light indicate?
A

 The standby rudder system is commanded on to pressurize the standby rudder power control unit

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7
Q
  1. When does illumination of the STBY RUD ON light take place?
A

 When the force fight monitor (FFM) detects opposing pressure between A and B actuators (this may occur if either system A or B is jammed or disconnected) or if Stby rudder switch is on (A or B)

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8
Q
  1. What is indicated by an electric pump OVERHEAT light?
A

 Associated pump has overheated  (Abex electric motor driven hydraulic pump option)  If an overheat is detected in either pump, the related overheat light illuminates  (Vickers electric motor driven hydraulic pump option)  If an overheat is detected in either pump, the related overheat light illuminates, power is removed from the pump and the low pressure light illuminates

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9
Q
  1. What is indicated by a LOW PRESSURE light?
A

 Output pressure is low

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10
Q
  1. When is the engine LOW PRESSURE light deactivated?
A

 When the associated engine fire handle is pulled

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11
Q
  1. When is the electric pump LOW PRESSURE light deactivated?
A

 Never

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12
Q
  1. What happens when you turn OFF an engine pump switch?
A

 Blocks output pressure (by way of a blocking solenoid)

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13
Q
  1. What happens in the hydraulic system when you pull and engine fire switch?
A

 Shuts off fluid to the pump and deactivates the low pressure light

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14
Q
  1. What is the normal hyd system pressure?
A

 3,000PSI

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15
Q
  1. What is the maximum hyd system pressure?
A

 3,500PSI

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16
Q
  1. What is the minimum hyd system pressure?
A

 2,800PSI

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17
Q
  1. What does an RF mean adjacent to the hydraulic quantity gage?
A

 Refill

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18
Q
  1. When is a RF indicated adjacent to hyd qty?
A

 Quantity less than 76%

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19
Q
  1. Which hydraulic system powers the: Gear
A

A

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20
Q
  1. Which hydraulic system powers the: TE Flaps + LE Devices
A

B

21
Q
  1. Which hydraulic system powers the: Normal Brakes
A

B

22
Q
  1. Which hydraulic system powers the: Flight Spoilers 1⁄2 by
A

A

23
Q
  1. Which hydraulic system powers the: Flight Spoilers (2 out of four ea. wing) 1⁄2 by
A

B

24
Q
  1. Which hydraulic system powers the: Autopilot A
A

A

25
Q
  1. Which hydraulic system powers the: Autopilot B
A

B

26
Q
  1. Which hydraulic system powers the: Ailerons
A

A & B

27
Q
  1. Which hydraulic system powers the: Elevator
A

A & B

28
Q
  1. Which hydraulic system powers the: Thrust reverser #1
A

A

29
Q
  1. Which hydraulic system powers the: Thrust reverser #2
A

B

30
Q
  1. Which hydraulic system powers the: PTU
A

A

31
Q
  1. Which hydraulic system powers the: LGTU
A

B

32
Q
  1. Which hydraulic system powers the: Ground Spoilers
A

A

33
Q
  1. Which hydraulic system powers the: Yaw Damper
A

B

34
Q
  1. Which hydraulic system powers the: Nose wheel steering
A

A

35
Q
  1. Which hydraulic system powers the: Alt Nose wheel steering
A

B

36
Q
  1. Which hydraulic system powers the: Alternate Brakes
A

A

37
Q
  1. Which hydraulic system powers the: Rudder
A

A & B

38
Q
  1. How does the output of an electric pump compare with the engine driven pump?
A

 Engine driven pump output volume 4 times greater

39
Q
  1. Where are the heat exchangers for the (electric) hydraulic fluid located?
A

 Main fuel tanks

40
Q
  1. How much fuel is required in the tanks for ground operation of the electric hyd pumps?
A

 1675lbs

41
Q
  1. What are the consequences of a leak in System A engine pump or lines?
A

 Fluid Leaks to standpipe (approx 20% left at standpipe)

42
Q
  1. What are the consequences of a leak in System A electric pump?
A

 Complete fluid loss

43
Q
  1. What are the consequences of a leak in System B?
A

 Fluid loss to standpipe (still allows PTU operation)

44
Q
  1. What are the consequences of a leak in the STBY System?
A

 Complete fluid loss (B system to 72%)

45
Q
  1. What does the PTU do?
A

 LED extension and retraction; autoslat operation (airborne, flaps <15 but not UP, and loss of System B engine driven pump pressure)

46
Q
  1. What does the LGTU do?
A

 B system transfers fluid to A system to help raise the gear

47
Q
  1. What does the STBY Hydraulic system power?
A

 Standby rudder, thrust reversers, leading edge devices, and Stby yaw damper (manual reversion)

48
Q
  1. How is the STBY HYD System activated manually?
A

 STBY rudder or ALT flaps master SW

49
Q
  1. How is the STBY HYD System activated automatically?
A

 Loss of system A or B, flaps not up, 60 KTS or greater or airborne or FFM activated

x. ORAL STUDY GUIDE - 737NG (18 decks)

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