(1) After stopping, the parking brake may be inoperative due to low blue system accumulator pressure.
(2) The elevators remain operative and the auto trim function remains available through the elevators
(3) For approach, landing gear will be extended by gravity to preserve green system integrity for flight controls.
ABNORMAL OPERATIONS
HYDRAULIC
Intentionally left blank
ABNORMAL OPERATIONS
LANDING GEAR
LDG WITH ABNORMAL L/G
Applicable to: ALL
This situation might occur following completion of a L/G GEAR NOT DOWNLOCKED procedure. It is always better to land with any available gear rather than carry out a landing without any gear.
In all cases, weight should be reduced as much as possible to provide the slowest possible touchdown speed. Although foaming of the runway is not a requirement, full advantage should be taken of any ATC offer to do so.
The passengers and cabin crew should be informed of the situation in good time. This will allow the cabin crew to prepare the cabin and perform their emergency landing and evacuation procedures. If one or both main landing gears in abnormal position, the ground spoilers will not be armed to keep as much roll authority as possible for maintaining the wings level. Ground spoiler extension would prevent spoilers from acting as roll surfaces.
The crew will not arm the autobrake as manual braking will enable better pitch and roll control. Furthermore, with at least one main landing gear in the abnormal position, the autobrake cannot be activated (ground spoilers not armed).
With one main landing gear not extended, the reference speed used by the anti-skid system is not correctly initialized. Anti-skid operation might be affected, and consequently, the anti-skid must be switched off.
In all cases, a normal approach should be flown and control surfaces used as required to maintain the aircraft in a normal attitude for as long as possible after touchdown. The engines should be shut down early enough to ensure that fuel is cut off prior to nacelle touchdown, but late enough to keep sufficient authority on control surfaces in order to:
? Maintain runway axis
? Prevent nacelle contact on first touch down
? Maintain wing level and pitch attitude as long as possible.
Considering a realistic hydraulic demand, the hydraulic power remains available up to approximately 30 s after the shut down of the related engine. It is the reason why the recommendations to switch the ENG masters OFF are as follow:
? If NOSE L/G abnormal
Before nose impact
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本文链接地址：A330/A340 机组训练手册 FCTM Flight Crew Training Manual 2(41)
