Originally Posted by
Eesh
I have a stupid question, may be better to get it discounted early.
When MCAS is active, could there be any difference in the control of electric trim from the trim switches at the Captains side and the FO side?
The Lion air Captain was winding back the trim wheel for seconds. The FO who was watching this all the time suddenly decided to use only blips, looks strange.
-Sanish
From the wiring diagrams and what ends up at the eaton trim motor assembly it should be no different.
However the digital representation of th FOs trim signal in the captains FCC could be different if e.g. FOs trim signal is digitized by FOs FCC and sent via datalink. And if interlock relies on software not on logic in the motor assembly.
Big IFs that's why more transparency is needed.