Hydraulic System Flashcards
What 4 systems are operated by hydraulics?
Flaps, Landing Gear, Power Brakes, Speed Brakes
What are the 3 secondary flight control systems?
Flaps, Speed brakes, Trim
Is the landing gear handle mechanical, electrical, or hydraulic?
hydraulic
Hydraulic reservoir capacity is:
1.2 gallons
HYD LEVEL LO illuminates at:
0.6 gallons in hyd reservoir
Bleed air pressure to the hydraulic reservoir is:
15 psi
The hydraulic pumps are ____ displacement pumps
Variable
Hydraulic normal operating pressure
1,500 psi
Hydraulic pump flow varies from 0 to __ gallons per minute
3.9
L or R H PMP PRESS LO illuminates at:
<750 psi downstream of one hydraulic pump
How many filters are in the hydraulic system?
3
Hydraulic filters have automatic bypass at __ psi
50
Hydraulic indicator is calibrated from 0 to ____ psi
2000
The hydraulic pressure relief valve starts to open at ____ psi
1650
If hydraulic pressure reaches ____ psi, the crew must open the bypass valve
1850
The hydraulic valve package controls flow to what 3 systems?
landing gear, flaps, speed brakes
How many return lines are in the hydraulic system?
2
Hydraulic system normal pressure range
1350 to 1550 psi
Landing gear warning horn illuminates when…
1) Throttles < 70% N2 and flaps 0 or 10. 2) Flaps beyond 10.
A solenoid locks the gear handle when…
… the left switch detects weight on wheels
Nosewheel deflection range with only nosewheel steering:
25 degrees each side
Nosewheel deflection range with brakes and differential power:
45 degrees each side
EMER DOOR CLOSE uses _____ to close the main gear fuselage doors
nitrogen