Hydraulics Flashcards
(14 cards)
DAL-ABQ @FL300 illuminated lights: M/C, FLT CTRL A LP, HYD ENG1/ELEC2 LP
What is wrong?
Loss of System A hydraulics
What other indications can help confirm the problem?
MFD hydraulic quantity/pressure readings and A A/P disengage
Major affected systems System A fail
*A/P A
*Engine 1 TR’s
*Normal nose wheel steering
*Normal gear extension/retraction
*Some ground/flight spoilers each wing
Can you continue to destination?
Yes unless system B pressure is also lost
Considerations for landing System A fail
Manual extension of gear and no ability to retract. (drag penalty)
MDW-DEN @FL340 illuminated lights: M/C, FLT CTRL B LP, HYD ENG2/ELEC1 LP
What is the problem
Loss of system B hydraulics
Major affected systems System B fail
*A/P B
*Engine 2 TRs
*Normal braking/Autobrake
*Yaw damper
*Some flight spoilers (2 each wing)
*Alternate nose wheel steering
*TE/LE flaps and slats
Why do you plan a flaps 15 landing?
Better performance on a go-around
IF you had HYD A or B fail and STBY HYD LOW QUANTITY what would you do?
Land at nearest suitable airport because AOM 5 states the Standby system is considered 1 of the 3 HYD systems and you must land nearest suitable when only 1 functioning system remains
What should you consider prior to extending flaps?
LE devices (flaps and slats) cannot be retracted (fuel penalty)
Aircraft must not be towed forward unless…
Both engines off and HYD A pumps depressurized
How can STBY HYD be activated
Manually: Either A or B flight control switch position to STBY RUD….OR….ALT FLAPS master to ARM
Automatically: Inflight with loss of system A or B and flaps extended…OR on ground with wheel speed greater than 60kts
The significant difference between elec and eng driven hyd pumps
Eng driven push 6x the volume of elec pumps at same PSI
Standby hydraulic system powers what
Stby yaw damper, TRs, Rudder, LE flaps and slats (extend only)
