Flashcards in REVIEW QUESTIONS – HYDRAULICS Deck (13)
1. Where are the hydraulic systems' fluid reservoirs located?
-Main Wheel Well
2. What pressurizes the System A and B reservoirs?
-Regulated bleed air
3. What pressurizes the Standby System reservoir?
-System B reservoir pressure
4. When do the letters RF (white) appear?
-quantity is below 76%
5. What does the ELEC 2 pump ON/OFF switch control?
-The System A electric motor driven pump
6. What happens when an ENG hydraulic pump switch is turned off?
-Energizes the depressurization solenoid that closes the Blocking Valve (prevents fluid going to the pump, but the pump still operates)
7. What is normal Hydraulic System pressure? Maximum pressure?
-3000 psi +/- 200
-3500 psi is max pressure
8. What does the OVERHEAT (amber) light on the Hydraulic Panel indicate?
-That there is an overheat condition in that system
9. What is the purpose of the Power Transfer Unit (PTU)?
-to provide B system sufficient pressure to have normal rates of operation of the Autoslats and Leading Edge Devices if the B system Engine driven pump drops below a certain limit. It uses A system pressure with out any fluid transfer
10. Does System A or B pressure loss alone cause operation of the Standby Hydraulic System?
-No, you also need: flaps extended, airborne or wheel speed greater than 60 kts, and FLT CONTROL switch A or B Hydraulic System ON or the main PCU Force Fight Monitor (FFM) trips
11. What could cause automatic operation of the Standby Hydraulic System?
-Loss of System A or B, flaps extended, airborne or wheel speed greater than 60 kts, and FLT CONTROL switch A or B Hydraulic System ON or the main PCU Force Fight Monitor (FFM) trips
12. Which switches activate the Standby System for operation of the rudder and thrust reversers?
-FLT CONTROL switch to STBY RUD