Hydraulics 747-400 Flashcards
1
Q
What could be the reason for a hydraulic quantity decrease during flight?
A
1) Large actuators operating like Landing gear retraction
2) Cold soak condition.
2
Q
Engine 3 is shut down due to fire warning and the fire switch is pulled. What happens to the hydraulic system.
A
EDP 3 depressurized and SOV 3 closed, demand pump 3 commanded to run.
3
Q
On approach, selecting flaps 5, and the HYD PRESS DEM 1 message appears. What can fix the situation?
A
Selecting demand pump selector 1 to ON may solve the problem.
4
Q
Which abnormal condition does not trigger the SYS FAULT light?
A
System reservoir pressure low.
5
Q
What EICAS message triggers the beeper when it comes to hydraulics?
A
HYD PRESS SYS
