Hydraulic system Flashcards
Is the brake system hydraulically operated by the hydraulic system
No, it’s mechanically actuated and hydraulically operated but independent of the hydraulic system.
What determines the amount of braking
the pilot providing the most force. The other pilot is not helping at all. The forces are not added together
Why do we check the parking brake reservior
We check the parking brake reservoir for the green band to make sure it’s not over serviced or underserviced
What is the capacity of the hydraulic system
5 quarts
When does the pressure relief valve open in the emergency system and the hydraulic system to
3250-3500psi
What does the hydraulic pump pressurize the normal system and emegerency system to
3000 +/-120
Once pressure exceeds _____ the system can power the landing gear, main gear doors, flaps, speed break, and nose wheel steering
1800
When does the HYDR FL LO annunciator come on
When the reservoir level has dropped below approximately 1 quart
What has happened when the amber EHYD PX LO annunciator is illuminated
The emergency accumulator pressure drops below 2400 +/-150
What does the check valve do
It prevents the emergency system from bleeding back into the main system if the main system fails
what happens when you pull the emergency extension
it isolates the main hydraulic system at the power pack slide assembly and releases the emergency accumulator pressure through independent emergency lines to extend the landing gear and flaps
The fluid flow to the emergency accumulator is restricted to a rate below
.25 gallons per min
In the event of an emergency hydraulic system leak that exceeds .25 GPM, the fuse limits fluid loss to a maximum volume of ____
20-30 cubic inches (.5 quarts)
How long does it take approximately to raise the gear
6 seconds
The aural landing gear position warning is a ____ tone repeated ____
250HZ, 5 times / sec
