Week 3 Flashcards
What are the 3 main jobs of the hydraulic system?
- Generate pressure
- Store fluid
- Port fluid
What component in the hydraulic reservoir provides fluid quantity indication?
RVDT
What type of hydraulic tubing is used in FOD probe areas?
Stainless steel
How many hydraulic pumps in total?
- 2 edp
- 1 ptu
- 1 aux
How does the PTU work?
Right system pressure drives a motor, spinning a pump and pressuring left system
If you lose the right hydraulic system, what happens to the PTU?
Unavailable
With both engines running, can you manually select the PTU on?
Yes
In the hydraulic pressure relief/unloading valve, what order do the valves work?
- pressure relief opens
- if PRV open for 10-30 seconds, pressure dependent, unloading valve latched by hydraulic pressure, closing PRV
Do the PTU or AUX pump deal with the pressure relief and unloading valve?
No
What causes the hydraulic unloading valve to close?
0 gallons per minute flow
What can cause aux pump fail (amber) CAS?
- <850psi
- pressure indicated with pump off (failed check valve)
Just landed, what holds NLG down?
- suitcase springs
- down lock actuator
What brakes does the aux pump pressurise?
Inboard
How many proximity sensors in the gear system?
30
How many pros sensors in gear system deal with WOW?
6