Originally Posted by
retired guy
The reduction in wheel size I agree will mean that it will be harder to turn for a given out of trim condition. But I bet that up to VMO Boeing tested it with “two pilot effort” as described in the flight training manual. That’s both guys cranking together.
Well that makes it compliant for certification then doesn't it!
Emergency to be carried out by a single crew member - trim run away a memory item!! but needs two crew to crank the handle/s
And all simulators under stated the trim wheel forces (the only training crews ever get/got).
Retired Guy it was known well before the NG that the trim wheel was "marginal" and a procedure was put in the manuals - but that was removed and the wheel reduced in size.
But for certification (inc the MAX) up till VMO will need a single pilot to carry out the trim adjustment, not two or both.
That will be tricky I expect (even for an NG!).