Originally Posted by
TURIN
A similar thing happened at Big Airways on a - 200. I believe the AMM was changed afterwards to clarify the procedure.
I've flown on a couple of those manual reversion tests. Has to be done (on the 737-400) at 17000' and 30000'. The amount of stab trim required depends on the rods on the trim tab (titanium or steel) and the hope they've been adjusted correctly!