Hydraulic System Flashcards
The Demand Pump Selectors for System 1 and 4 are in AUTO. What will cause them to activate?
(AOM Vol II, Ch 13)
- Respective engine pump output is low.
- Respective Fuel Control Switch is in cutoff .
- Flaps in transit on the ground .
- Flaps out of up in flight.
The Auxiliary Hydraulic Pump(s) are powered by what bus or busses?
(AOM Vol II, Ch 13)
• The Ground Handling Bus.
The number 4 Auxiliary Hydraulic Pump is selected on. Is the number 4 SYS FAULT light illuminated
(AOM Vol II, Ch 13)
• No.
Name the power sources for the Demand pumps?
AOM Vol II, Ch 13
- Number 1 and 4 are air driven.
* Number 2 and 3 are electric.
What causes the hydraulic SYS FAULT light to illuminate? (AOM Vol II, Ch 13)
- Low hydraulic system pressure.
- Low hydraulic reservoir quantity.
- Excessive hydraulic fluid temperature.
What is the minimum hydraulic quantity for dispatch?
AOM Vol I, Ch NP
• .70 as indicated on the secondary EICAS HYD synoptic or STAT display.
What is the implication of a BRAKE SOURCE light illuminated in flight?
(AOM Vol II, Ch 13)
• You have lost hydraulic systems 4, 1 and 2.
Hydraulic System 1 EDP is leaking. The EICAS advisory message “HYD PRESS ENG 1” is displayed. You look on the STATUS Page and see that the system 1 quantity indicates zero. Is Hydraulic System 1 still powered? If so, why?
(AOM Vol II, Ch 13)
- Yes
- The ADP draws its supply from the reservoir bottom. The EDP draws its supply from the reservoir at a level above the bottom, but coincident with the zero index of the quantity indication.
Hydraulic System 1 is unpowered. What major components are now unavailable?
(AOM Vol II, Ch 13)
- Nose and Body Gear hydraulic operation.
- Nose and Body Gear steering.
- Inboard Trailing Edge Flap hydraulic operation.
- Autopilot C.
- Left outboard Elevator.
- System 1 Alternate brakes.
Why does RF display next to the hydraulic quantity indication?
Where is it displayed?
Will it display in flight?
(AOM Vol II, Ch 13)
- Indicates that refill of the hydraulic reservoir is required.
- It is displayed on the Secondary EICAS Status Page and Hydraulic Synoptic.
- No.