13 - Hydraulics Flashcards

1
Q
  1. What are the hydraulic systems of the 737?
A
  • System A
  • System B
  • Standby
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q
  1. How are hydraulic reservoirs pressurized?
A

System A and B are pressurized by bleed air.
Standby system is pressurized through system B through a fill line

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q
  1. How are hydraulic systems quantity and pressure indications indicated on the MDS?
A

By selecting SYS on the MFD

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q
  1. What does an RF on the HYDRAULIC indicator indicate and when is it valid?
A
  • The reservoir is below 76%
  • Only valid on the ground with both engines shut down, or
  • After landing during taxi in with the flaps UP
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q
  1. How does flap operation affect hydraulic fluid quantity indications?
A

Extension of the leading edge devices may result in up to 20% drop in indicated quantity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q
  1. What is the normal pressure of hydraulic systems A & B?
A

3,000 psi +/-200

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q
  1. When does the STANDBY HYD LOW QUANTITY light illuminate?
A

When the standby hydraulic system has less than 50% quantity in the reservoir

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q
  1. Which precaution(s) should be taken when turning on the electric hydraulic pumps?
A
  • Turn on the EMDPs one at a time to avoid an amperage surge
  • Ensure there is at least 1,675lbs of fuel in the respective main tank
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q
  1. What does moving a FLT CONTROL switch to STBY RUD do?
A

• activates the standby electric motor-driven pump
• shuts off the related hydraulic system pressure to ailerons, elevators, and rudder by closing the flight control shutoff valve
• opens the standby rudder shutoff valve
• allows the standby system to power the rudder and thrust reversers
• deactivates the related FLT CONTROL LOW PRESSURE light when the standby
rudder shutoff valve opens
• arms the STANDBY HYD LOW PRESSURE light
• illuminates the STBY RUD ON light and the FLT CONT System Annunciator and
MASTER CAUTION lights

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q
  1. What causes the automatic operation of the standby hydraulic system?
A

When one of the following conditions exist with the FLT CONTROL switches positioned ON and the loss of system A and/or B:
• Flaps extended, airborne
• Flaps extended, wheel speed greater than 60 kts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q
  1. What does automatic operation of the standby hydraulic system activate?
A

• activates the standby electric motor-driven pump
• opens the standby rudder shutoff valve
• allows the standby system to power the rudder and thrust reversers
• illuminates the STBY RUD ON light and the FLT CONTROL System Annunciator and
MASTER CAUTION lights

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q
  1. What is the purpose of the PTU?
A

To provide hydraulic system B fluid at a flow rate and pressure for normal rates of operation of the autoslats and leading edge devices

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q
  1. What fluid percentage does the standpipe in the system A reservoir preserve in the event of a leak?
A

20%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q
  1. What fluid percentage does the standpipe in the system B reservoir preserve in the event of a leak?
A

Approximately 0%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q
  1. With 0% indicated on the system B quantity indicator, can the PTU still operate?
A

Yes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q
  1. How does a leak in the standby hydraulic reservoir affect the system B quantity?
A

If a leak occurs in the standby system, the standby reservoir quantity decreases to zero.
System B continues to operate normally; however, the system B reservoir fluid level
indication decreases and stabilizes at approximately 70% full.

17
Q
  1. What components of system A are unique to that system?
A

Ground spoilers
Alternate brakes
No. 1 Thrust Reverser
Autopilot A
Normal NWS
Landing Gear
PTU

18
Q
  1. What components of system B are unique to that system?
A

Leading Edge Flaps and Slats
Normal Brakes
Brake Accumulator
No. 2 Thrust Reverser
Autopilot B
Alternate Nose Wheel Steering
Landing Gear Transfer Unit
Autoslats
Yaw Damper
Trailing Edge Flaps