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Old 10th Oct 2020, 08:30
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FlexibleResponse
 
Join Date: May 2002
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Originally Posted by vilas
The first comment on the report in Avherald makes it very scary. It could have ended in disaster. The RW is short with no overrun the crew wouldn't consider abort takeoff. The aircraft which is in direct law on ground got airborne only because of the thrust/weight couple created by TOGA. Otherwise they would've overrun with takeoff thrust. Providential escape.
The Captain saved the day by selecting TOGA which provided an UP pitching moment as pointed out by vilas .

The other thing they could have done was to move the trim wheel to increase UP stabilator (the stabilator is frozen at the TO Trim setting in direct law until airborne).

When you run out of elevator authoriy (or up/down pitch stick control authority) in an all-moving-tail (all-flying-tail) aircraft (most airliners), in any phase of flight, you must manually move the stabilator to regain control.

The same applies to datum trim aircraft (which then need to be re-trimmed).
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