HYD Flashcards
Where are the hydraulic systems’ fluid reservoirs located?
Main wheel well area
Sec 13.010 p 3
What pressurizes the System A and B reservoirs?
Bleed air
Sec 13.010 p 3
What pressurizes the Standby System reservoir?
System B reservoir pressure
Sec 13.010 p 3
When do the letters RF (white) appear?
when hydraulic quantity is below 76% (on ground with eng shutdown or flaps up taxi in)
(Sec 13.010 p 4)
What does the ELEC 2 pump ON/OFF switch control?
Electric hydraulic pump for the A system
Sec 13.010 p 6
What happens when an ENG hydraulic pump switch is turned off?
energizes the depressurization solenoid that closes the blocking valve (isolates fluid but pump continues to rotate)
(Sec 13.010 p 5-6)
What is normal Hydraulic System pressure? Maximum pressure?
Norm: 3000 +/- 200 psi
Max: 3500 psi
(Sec 13.010 p 7)
What does the OVERHEAT (amber) light on the Hydraulic Panel indicate?
overheat condition detected in respective system – causes HYD on Master Caution
(Sec 13.010 p 8)
What is the purpose of the Power Transfer Unit (PTU)?
Autoslats and LEDs
Sec 13.010 p 9
Does System A or B pressure loss alone cause operation of the Standby Hydraulic System?
No
Auto:
-flaps extended, and
-airborne or wheel speed greater than 60 kts, and
-loss of Sys A or B, FLT CONTROL switch set to ON
OR:
-main PCU Force Fight Monitor (FFM) trips
(Sec 13.010 p 13)
What could cause automatic operation of the Standby Hydraulic System?
-main PCU FFM trips
Sec 13.010 p 13
Which switches activate the Standby System for operation of the rudder and thrust reversers?
Flight Control switch (Sys A or B) or ALT FLAPS to ARM
Sec 13.010 p 12
What does the STANDBY HYD LOW QUANTITY (amber) light indicate?
standby reservoir quantity is less than 50%
Sec 13.010 p 12
