FCOM Vol 2 Knowledge Flashcards
Components powered by Hydraulic system B
- Ailerons
- Rudder
- Elevator and elevator feel
- Flight spoilers 3, 5, 8, 10
- Leading edge flaps and slats
- Normal brakes
- Number 2 thrust reverser
- Autopilot B
- Alternate nose wheel steering
- Landing gear transfer unit
- Autoslats
- Yaw damper
- Trailing edge flaps
Landing gear transfer unit activation
- Airborne
- No 1 engine RPM drops below a limit value
- Landing gear handle positioned UP
- either main gear is not up and locked.
Automatic standby hydraulic system activation
Loss of system A or B and,
Flaps extended and,
Airborne or wheel speed greater than 60kts and,
FLT CONTROL switch A or B hydraulic system on.
OR
the main PCU Force Fight Monitor (FFM) trips.
Power transfer unit automatic activation
- system B engine-driven pump hydraulic pressure drops below limits
- airborne
- flaps not up
Components powered by Hydraulic system A
- Ailerons
- Rudder
- Elevator and elevator feel
- Flight spoilers 2, 4, 9, 11
- Ground spoilers
- Alternate brakes
- Number 1 thrust reverser
- Autopilot A
- Normal nose wheel steering
- Landing gear
- Power transfer unit
LOW lights
Illuminate
Extinguish
907kg
1134kg
Components powered by the Standby Hydraulic System
- thrust reversers
- rudder
- leading edge flaps and slats (extend only)
- standby yaw damper
Standby Hydraulic leak
- LOW QUANTITY light illuminates approximately half empty
- system B operates normally, fluid level indication decreases to 72% and stabilises.
Minimum fuel for ground operation of electric motor-driven pumps
760kg
AUTO FAIL illuminates
- Loss of DC power
- Controller fault
- Outflow valve control fault
- Excessive differential pressure (>8.75psi)
- Excessive rate of cabin pressure change (2000fpm)
- High cabin altitude (>15,800ft)
Auto pressurisation schedule
At or below 28,000ft - 7.45 psid
28,000ft to 37,000ft - 7.8 psid
Above 38,000ft - 8.35 psid
