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SLATS / FLAPS RETRACTION ON GROUND
With the aircraft on ground, the configuration is 1+F.
Once the surfaces have reached the fully retracted
position, the clean configuration is displayed on the
ECAM display.
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SLATS AND FLAPS CONTROL AND POSITION INDICATION
SLATS / FLAPS EXTENSION IN FLIGHT
In flight, there are two configurations, depending on
speed, for extension from 0 to position 1:
- Speed above 100kt.
- Speed below 100kt.
For position 2 to Full, the deflection angles are the
same as those mentioned for extension on ground.
NOTE : Extension to position 1 on ground both Slats
and Flaps extend.
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SLATS AND FLAPS CONTROL AND POSITION INDICATION
SLATS / FLAPS RETRACTION IN FLIGHT
Retraction from fully extended, to position 3 and from
position 3 to position 2 is identical to surface
retraction on ground.
There are two configurations, depending on speed, for
retraction to position 1 in flight:
- Speed above 210kt.
- Speed below 210kt.
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SLATS AND FLAPS CONTROL AND POSITION INDICATION
AUTOMATIC RETRACTION IN FLIGHT
The present speed is lower than 210 knots and the
configuration is 1+F.
The flap auto function is engaged. When the computed
airspeed reaches 210 knots, the flaps retract
automatically to 0 and the new slat flap configuration
is 1.
Note that, when take off is performed in config 1+F,
flaps fully retract automatically at 210 knots if
config 0 is not selected after take off.
- Speed below 210kt - Slats 18° / Flaps 10°
- Speed above 210kt - Slats 18° / Flaps 0°
After an automatic flap retraction, there is no
automatic re-extension if the speed drops below 210
knots.
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SLATS AND FLAPS CONTROL AND POSITION INDICATION
SLATS ALPHA-LOCK PROTECTION
Slat retraction from position 1 to 0 is inhibited to
prevent the aircraft from stalling when the Angle Of
Attack (AOA) is high (alpha-lock) or the speed is too
low.
The slat channels of the SFCCs receive corrected Angle
Of Attack (AOA) and computed airspeed (CAS) provided
by the ADIRUs for use in alpha lock computation. A
cyan pulsing "A-LOCK" message is displayed to indicate
the retraction inhibition.
Slat retraction from 18° to 0° is prevented if:
- AOA greater than 8.5° or CAS lower than 148kt.
The alpha-lock function is reset if:
- AOA lower than 7.6° and CAS greater than 154kt.
The function is not active if:
- The aircraft is on ground with CAS lower than
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