HYDRAULICS Flashcards
- What does an illuminated STBY HYD LOW QUANTITY light indicate?
Low quantity (illuminates at approx 50%)
- Is this STBY HYD LOW QUANTITY light always armed?
Yes
- What does an illuminated STBY HYD LOW PRESSURE light indicate?
Low pressure
- Is the STBY HDY LOW PRESSURE light always armed?
No
- When is the STBY HDY LOW PRESSURE light armed?
When the standby system is armed or operating
- What does an illuminated STBY RUD ON light indicate?
The standby rudder system is commanded on to pressurize the standby rudder power control unit
- When does illumination of the STBY RUD ON light take place?
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)
- What is indicated by an electric pump OVERHEAT light?
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
- What is indicated by a LOW PRESSURE light?
Output pressure is low
- When is the engine LOW PRESSURE light deactivated?
When the associated engine fire handle is pulled
- When is the electric pump LOW PRESSURE light deactivated?
Never
- What happens when you turn OFF an engine pump switch?
Blocks output pressure (by way of a blocking solenoid)
- What happens in the hydraulic system when you pull and engine fire switch?
Shuts off fluid to the pump and deactivates the low pressure light
- What is the normal hyd system pressure?
3,000PSI
- What is the maximum hyd system pressure?
3,500PSI
- What is the minimum hyd system pressure?
2,800PSI
- What does an RF mean adjacent to the hydraulic quantity gage?
Refill
- When is a RF indicated adjacent to hyd qty?
Quantity less than 76%
- Which hydraulic system powers the: Gear
A
- Which hydraulic system powers the: TE Flaps + LE Devices
B
- Which hydraulic system powers the: Normal Brakes
B
- Which hydraulic system powers the: Flight Spoilers 1⁄2 by
A
- Which hydraulic system powers the: Flight Spoilers (2 out of four ea. wing) 1⁄2 by
B
- Which hydraulic system powers the: Autopilot A
A
- Which hydraulic system powers the: Autopilot B
B
- Which hydraulic system powers the: Ailerons
A & B
- Which hydraulic system powers the: Elevator
A & B
- Which hydraulic system powers the: Thrust reverser #1
A
- Which hydraulic system powers the: Thrust reverser #2
B
- Which hydraulic system powers the: PTU
A
- Which hydraulic system powers the: LGTU
B
- Which hydraulic system powers the: Ground Spoilers
A
- Which hydraulic system powers the: Yaw Damper
B
- Which hydraulic system powers the: Nose wheel steering
A
- Which hydraulic system powers the: Alt Nose wheel steering
B
- Which hydraulic system powers the: Alternate Brakes
A
- Which hydraulic system powers the: Rudder
A & B
- How does the output of an electric pump compare with the engine driven pump?
Engine driven pump output volume 4 times greater
- Where are the heat exchangers for the (electric) hydraulic fluid located?
Main fuel tanks
- How much fuel is required in the tanks for ground operation of the electric hyd pumps?
1675lbs
- What are the consequences of a leak in System A engine pump or lines?
Fluid Leaks to standpipe (approx 20% left at standpipe)
- What are the consequences of a leak in System A electric pump?
Complete fluid loss
- What are the consequences of a leak in System B?
Fluid loss to standpipe (still allows PTU operation)
- What are the consequences of a leak in the STBY System?
Complete fluid loss (B system to 72%)
- What does the PTU do?
LED extension and retraction; autoslat operation (airborne, flaps <15 but not UP, and loss of System B engine driven pump pressure)
- What does the LGTU do?
B system transfers fluid to A system to help raise the gear
- What does the STBY Hydraulic system power?
Standby rudder, thrust reversers, leading edge devices, and Stby yaw damper (manual reversion)
- How is the STBY HYD System activated manually?
STBY rudder or ALT flaps master SW
- How is the STBY HYD System activated automatically?
Loss of system A or B, flaps not up, 60 KTS or greater or airborne or FFM activated
