2 ms·
> there is no way to enable the trim thumb switches and disable MCAS This is simply wrong. The electric trim switches override MCAS regardless of whether MCAS
by WalterBright 1y ago
> there is no way to enable the trim thumb switches and disable MCAS
This is simply wrong.
The electric trim switches override MCAS regardless of whether MCAS is trying to drive the trim or not. Timing it for when the MCAS was not engaged is completely unnecessary.
- rtkwe 1y agoThe problem is they don't know MCAS exists so it looks like the trim system has failed and is running away so the normal and natural solution is to disable electronic trim. Had they known about MCAS they could have potentially known they could override it then disbale the trim system but that information was hidden by Boeing so they didn't do it..
- WalterBright 1y agoYes, it would exhibit as runaway trim, and the runaway trim procedure would have stopped it. There was also the Emergency Airworthiness Directive sent to all MAX pilots, which added the step of using the column switches to restore normal trim. Which the Lion Air crew did, but never turned off the trim system.