Originally Posted by
DaveReidUK
No, it's simply conforming to the provisions of the AD:
>Disengage autopilot and control airplane pitch attitude with control column and main electric trim as required.
>If relaxing the column causes the trim to move, set stabilizer trim switches to CUTOUT.
>
If runaway continues, hold the stabilizer trim wheel against rotation and trim the airplane manually.
Surely that's not strictly correct?
As the switches on the control column have no effect on MCAS "trim", the condition "
If relaxing the column causes the trim to move," is never satisfied.
So the AD doesn't actually specify "
set stabilizer trim switches to CUTOUT" for an unintended MCAS activation.
So the second line of the AD should have read something like:
>If relaxing the column causes the trim to move
- or if this is an inappropriate MCAS activation - set stabilizer trim switches to CUTOUT.
Or maybe a negative form would have been better:
>If the trim keeps running irrespective of control column input - set stabilizer trim switches to CUTOUT.
... but this would this have handled
appropriate MCAS activation?