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? If one MAIN L/G abnormal
failure side engine: After main gear touch down
other engine: Before nacelle touch down
? If both MAIN L/G abnormal
In the flare, before touch down
The reversers will not be used to prevent the ground spoilers extension and because the engine will touch the ground during roll out.
ABNORMAL OPERATIONS
LANDING GEAR
The engines and APU fire pbs are pushed when the use of flight controls is no longer required i.e. when aircraft has stopped.
NOSE WHEEL STEERING FAULT
Applicable to: ALL
If the Nose Wheel Steering (NWS) is lost for taxiing, the flight crew can steer the aircraft with differential braking technique. If the flight crew does not have experience with this technique, he should preferably request a towing to return to the gate. The flight crew can request the towing early in approach, if the failure has been triggered in flight.
LOSS OF BRAKING
Applicable to: ALL
GENERAL
If the flight crew does not perceive deceleration when required, the flight crew will apply the LOSS OF BRAKING procedure from memory because of the urgency of the situation.
PROCEDURE
The procedure is available both in the FCOM and the QRH. Some items need to be highlighted: USE OF REVERSE THRUST
‐ The efficiency of the reverse thrust decreases with aircraft speed.
‐ If needed, full reverse thrust may be used until coming to a complete stop. However, the use of high levels of reverse thrust at low airspeed can cause gases to re-enter the compressor. This can cause engine stalls that may result in excessive EGT.
‐ In addition, the use of reverse thrust (even at idle) increases the risk of foreign object damage (FOD).
A/SKID & N/W STRG OFF
Note: On A340-500/600 aircraft, the A/SKID & N/W STRG sw is replaced by the A/SKID sw .
‐ Select A/SKID & N/W STRG sw OFF to revert to alternate braking.
‐ Do not apply brake pressure when setting the A/SKID & N/W STRG sw OFF: the same pedal force or displacement produces more braking action in alternate mode than in normal mode.
ABNORMAL OPERATIONS
LANDING GEAR
‐ For this reason it is important to break up the action in three steps:
1. Release the brake pedals
2. Select A/SKID & N/W STRG sw OFF
3. Modulate brake pedal pressure to maximum 1 000 PSI. At low ground speed, adjust brake
pressure as required. Monitor the brake pressure on the BRAKE PRESS triple indicator.
‐ Task-sharing: The PF calls for “A/SKID & N/W STRG OFF” ("A/SKID OFF" on A340-500/600 aircraft) and the PNF then executes the action. In case of urgency and conditions permitting, the PF can himself select the A/SKID & N/W STRG sw OFF without call.
PARKING BRAKE
‐ Use short successive parking brake applications to stop the aircraft.
‐ Brake onset asymmetry may be felt at each parking brake application
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A330/A340 机组训练手册 FCTM Flight Crew Training Manual 2(42)
