Hydraulics Flashcards
Where are the hydraulic systems’ fluid reservoirs located?
Main wheel wells
What pressurizes the System A and B reservoirs?
Regulated bleed air.
What pressurizes the Standby System reservoir?
Connected to the system B reservoir.
When do the letters RF (white) appear?
When hydraulic quantity is below 76%.
What does the ELEC 2 pump ON/OFF switch control?
Controls the #2 electric hydraulic pump.
What happens when an ENG hydraulic pump switch is turned off?
Energizes the depressurization solenoid that closes the Blocking Valve. The Blocking Valve isolates fluid flow to the system components.
What is normal Hydraulic System pressure? Maximum pressure?
3000 +/- 200 psi. / 3500 psi.
What does the OVERHEAT (amber) light on the Hydraulic Panel indicate?
Indicates an overheat condition is detected in the respective system.
What is the purpose of the Power Transfer Unit (PTU)?
Provide Hydraulic System B fluid at a flow rate and pressure sufficient to provide normal rates of operation for the Autoslats and Leading Edge Devices (LED) in the event the Hydraulic System B Engine-Driven Pump output pressure drops below a specific value.
Does System A or B pressure loss alone cause operation of the Standby Hydraulic System?
No. Needs to be airborne with flaps extended. Or the PCU force flight monitor trips.
Which switches activate the Standby System for operation of the rudder and thrust reversers?
System A and/or B FLT CONTROL switches to STBY RUD.
What does the STANDBY HYD LOW QUANTITY (amber) light indicate?
Standby reservoir quantity is less than 50%
