ATA 29 - Hydraulic Flashcards
Description of the hydraulic system
Cf diagram
Normal hydraulic pressure ?
3000 psi +/-200psi
Hydraulic pressure when RAT out on blue circuit ?
2500 psi
HYD ENG pump OFF: no pressure delivered but pump still running. True or false ?
True
Capacity blue hydraulic reservoir ?
6,5 L
Capacity green hydraulic reservoir ?
14,5L
Capacity yellow hydraulic reservoir ?
12,5L
Systems powered by green hydraulic ?
Landing gear
Slats / flaps
Rev 1
Normal brake /autobrake
FCTL
Systems powered by blue hydraulic ?
Emer gen
Slats
FCTL
Systems powered by yellow hydraulic ?
Flaps
Rev 2
Alter/parking brake
Cargo door
FCTL
Causes of FAULT hydraulic engine pump ?
Low hydraulic quantity
Low hydraulic pressure (inhibited on ground, engine off)
Low air pressure
Overheat reservoir
Yellow electrical pump provides pressure to which systems ?
Cargo door
Rev 2
Alt/prk brake
When blue electrical pump activates ?
On ground, 1or 2 engines running
Inflight
PTU AUTO: delta pressure to activate ?
500psi
PTU is inhibited when 1 engine running and bypass pin or parkbrake. True or False ?
True
RAT deploys automatically if hydraulic failure . True or False ?
False. You need RAT MAN ON to provide hydraulic (but no elec)
Hydraulic pressure figure amber on ECAM page ?
1450 psi
Where comes from air to pressurize hydraulic reservoir ?
ENG1 HP
(XBleed if not available )
Cf diagram
When the PRIORITY VALVES operate ?
Low hydraulic pressure. Cut off big users.
During first ENGINE START the PTU is active or inhibited ?
Inhibited
The YELLOW SYSTEM includes operation of left or right elevator ?
Right elevator
On ground when is the BLUE SYSTEM pressurized ?
One engine running
On newer aircraft, with Yellow System lost, is NSW lost ?
Yes. On old aircraft NWS is on green circuit
The GREEN SYSTEM operates which ailerons ?
Both.
BG —————-GB
Which spoilers are actuated by which hydraulic circuit ?
1___2___3___4___5
G. Y. B. Y. G
Which ailerons is operated by Blue circuit ?
Both
BG ____GB
Which elevator is operated by green circuit ?
Left elevator
YELLOW ELEC PUMP OFF. Ground crew select cargo door lever manually on OPEN or CLOSE. Is yellow circuit pressurized ?
Yes. It comes on automatically when a crewman sets the lever of the cargo door manual selector valve to OPEN or CLOSE. PTU and flight controls are inhibited as usual.
Which systems are cut off by the hydraulic priority valve ?
Green: Landing gear and slats/flaps
Blue: Emer gen and slats
Yellow: flaps
