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ABNORMAL OPERATIONS
FLIGHT CONTROLS
ABNORMAL FLAPS/SLATS CONFIGURATION
Applicable to: ALL
CAUSES
Abnormal operation of the flaps and/or slats may be due to one of the following problems:
? Double SFCC failure
? Double hydraulic failure (B+G or Y+G)
? Flaps/Slats jammed (operation of the WTB)
CONSEQUENCES
Abnormal operation of the flaps and slats has significant consequences since:
? The control laws may change
? The selected speed must be used
? A stabilized approach should be preferred
? The approach attitudes change
? Approach speeds and landing distances increase
? The go-around procedure may have to be modified.
Note: The FMS prediction do not take into account the slat or flap failures. Since fuel consumption is increased, these predictions are not valid.
FAILURE AT TAKEOFF
Should a flap/slat retraction problem occur at takeoff, the crew will PULL the speed knob for selected speed to stop the acceleration and avoid exceeding VFE. The overspeed warning is computed according to the actual slats/flaps position.
The landing distance available at the departure airport and the aircraft gross weight will determine the crew’s next course of action.
FAILURE DURING THE APPROACH
The detection of a slat or flap failure occurs with the selection of flap lever during the approach. With A/THR operative, the managed speed target will become the next manoeuvring characteristic speed e.g. S speed when selecting flap lever to 1.
At this stage, if a slat or flap failure occurs, the crew will:
? Pull the speed knob for selected speed to avoid further deceleration
? Delay the approach to complete the ECAM procedure
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