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Old 9th Jul 2019, 21:12
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walkon19
 
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Question Trim or else ...

back on 18 march post 2027 on Thread Ethopian airliner down africa 102




Mick GO105 posted the following


Quote:

Originally Posted by JT8D-17

How many turns of the wheel are required to change trim by one unit?

10 rotations for one unit of trim.

(Source: Boeing FCOM Bulletin FLR-6(FR) dated August 10, 2012. Subject: Runaway Stabilizer Procedure. From Background '.. the stabilizer trim wheel coasted up to 40 turns (four units of trim).')



++++

So IF MCAS or other fubar system runs AND for.5 degrees/units (?) in ?? seconds- twice as fast as trim switch- and then one reverts to manual - how long and how hard to wind wheel at least 5 turns- and how long to turn 40 turns ... while being lifted by negative G and ground approaching and now one is supposed to cut throttles to avoid overspeed - try this in the sim at say 5000 AGL ! With a sSm that at least requires force as a function of airspeed... plus feel force and override of clutch or break.
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