Sylvia Else wrote:
> John Mazor wrote:
>
> > And even
> > if they had done nothing, the mechanism probably would have failed before
> > they could land, anyway.
>
> Hard to say that with any certainty. At the point where the fault was
> noticed, certainly part of the thread had come off the nut. But had all
> of it come off, or did that only happen during the repeated attempts to
> free it? If the latter is the case, then I'd think it was still capable
> of withstanding the longitudinal loads, and the aircraft could have
> continued flying for as long as they left the trim alone.
>
> >
> > There were no engineers before the fact saying "Oh, yeah, we know that if
> > you get those symptoms, it's not a trim problem, the screw threads are about
> > to strip and fail."
>
> Yet it seems from the report that the crew had fairly quickly
> established that the trim was jammed, and not simply not being moved.
> They talk about trying everything together. I think they were trying to
> muster enough torque to free the jam. Well, they managed to, unfortunately.
Yeah, didn't they try 'waggling' the trim to free it up ?
Gotta teach those pilots to stop waggling things !
Graahm
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