Hydraulic Flashcards
What aircraft components are actuated by the hydraulic system
1) Landing Gear Extension/ Retraction
2) Brakes - Main
3) Emergency Parking Brake
4) Multi Function Spoilers
5) Spring Loaded Rudder Booster
6) Stick Pusher
What is the function of the main hydraulic accumulator
Stores pressure for periods of increased demand (simultaneous brake and ground spoiler application)
What is the function of the priority valve
Restricts flow to the Landing Gear actuators during simultaneous operation of multiple hydraulic loads (last priority to the Landing Gear)
How many total Hydraulic filters in the system
2 total
How much pressure is normally supplied to the hydraulic system through the right and left pumps
Right: 2850 PSI
Left: 3000 PSI
What is the indication of impending hydraulic filter bypass?
Differential pop up indicators on the reservoir/ manifold assembly
What actions/ conditions close the hydraulic shutoff valves?
1) HYD PUMP switch CLOSED
2) Fire Shutoff Button pushed in
3) Hydraulic Fluid Overtemp (automatically closes both valves)
What pilot action is necessary for an accurate hydraulic fluid level check
Emergency/ Parking Brake accumulator completely discharged
Above what value, following shutdown, should the hydraulic system pressure fall rapidly (1000psi per second)?
1200 PSI
