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brake surface hot spots. Selecting brake fans before reaching the gate prevents the
brake fans from blowing carbon brake dust on the ground personnel.
2. The brake temperature sensor is located close to the carbon, but not inside.
Consequently, when the brake fan is ON, the indicated temperatures rapidly
decrease.
PARK BRK : PREFER CHOCKS
L2 If the “BRAKES HOT” message is still on when the aircraft is parked, the flight crew should not
set the PARKING BRK ON.
L1DELAY T.O. FOR COOLG
L2‐ Delay takeoff until the brake temperature is below 300 °C (or 150 °C with the brake fans on).
L12‐ Refer to PRO-SUP-32 Brake Temperature Limitations Requiring Maintenance Actions, for
brake temperature limitations requiring maintenance actions.
L1 In flight :
IF PERF PERMITS :
L/G...............................................................................................................DN FOR COOLG
MAX SPEED................................................................................................................250/.55
L2 If performance permits, landing gear retraction should ‐ be delayed to improve brake
cooling.
L12‐ Reduce the speed to 250 kt for landing gear operation.
To be continued on next page
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
ABNORMAL AND EMERGENCY PROCEDURES
LANDING GEAR
A330/A340 FLEET PRO-ABN-32 P 55/64
FCOM 19 AUG 10
BRAKES HOT (Cont'd)
On ground :
BRK FAN (IF INSTALLED)...................................................................................................... ON
L12
Note: The brake temperature sensor is located close to the carbon, but not inside.
Consequently, when the brake fan is ON, the indicated temperatures decrease
rapidly. Before selecting the brake fans at the gate, the flight crew should first warn
the ground personnel in order to avoid blowing carbon brake dust on them.
PARK BRK : PREFER CHOCKS
L2 If the “BRAKES HOT” message is still on when the aircraft is parked, the flight crew should not
set the PARKING BRK ON.
L1DELAY T.O. FOR COOLG
L2‐ Delay takeoff until the brake temperature is below 300 °C (or 150 °C with the brake fans on).
L12‐ Refer to PRO-SUP-32 Brake Temperature Limitations Requiring Maintenance Actions, for
brake temperature limitations requiring maintenance actions.
L1 In flight :
IF PERF PERMITS :
L/G...............................................................................................................DN FOR COOLG
MAX SPEED................................................................................................................250/.55
L2‐ If performance permits, landing gear retraction should be delayed to improve brake
cooling.
L12‐ Reduce the speed to 250 kt for landing gear operation.
MAX SPEED............................................................ 250/.55
BRAKES PARK BRK ON
Applicable to: ALL
PARK BRK.................................................................................................................................. OFF
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
ABNORMAL AND EMERGENCY PROCEDURES
LANDING GEAR
A330/A340 FLEET PRO-ABN-32 P 56/64
FCOM 19 AUG 10
WHEEL HYD SEL VALVE
Applicable to: ,
L2 Failure of the normal brake selector valve, or the steering selector valve, in the open position.
L12 If the normal brake selector valve is failed open, full green hydraulic ‐ pressure is present at
normal servovalves’ entry.
Nosewheel steering remains available.
L12‐ On ground, do not tow the aircraft with the green hydraulic system pressurized : If the steering
selector valve is failed open, nosewheel steering remains pressurized, and so towing may either
break the towbar’s shear pin, or the nose gear (if towbarless towing).
L12‐ If the steering selector valve is failed open, setting A/SKID & N/W STRG sw to OFF will cause
the nosewheel to go to maximum deflection.
L1 A/SKID N/WS....................................................................................................................... KEEP ON
L2 As long as antiskid is operative, brake pressure is regulated by normal servovalves
A/SKID N/WS.......................................................KEEP ON
WHEEL HYD SEL VALVE
Applicable to: MSN ,
,
L2 Failure of the normal brake selector valve, or the steering selector valve, in the open position.
L12‐ If the normal brake selector valve is failed open, full green hydraulic pressure is present at
normal servovalves’ entry.
Nosewheel steering remains available.
L12‐ On ground, do not tow the aircraft with the green hydraulic system pressurized : If the steering
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A330/A340机组操作手册 FLIGHT CREW OPERATING MANUAL FCOM 8(63)
