Originally Posted by
Luc Lion
That statement is wrong.
There is nothing in the FCOM nor in the QRH that instructs to use electric trim buttons to put the aircraft in trim prior to flip the cutout switches,
even though I reckon that, calmly sitting in a chair in front of a computer, it looks like a good idea.
The QRH just says
The only information akin to that is in the airworthiness directive AD 2018-23-51 and it only says:
(my emphasis)
"can be used", in a note, is hardly an instruction.
No disagree - I just posted the link.
The note is misleading in such an event in my opinion. I expect it was that way for Loin Air reasons (blame the pilot!)
Thing is a MCAS event before MCAS was known, was reported as a STS operating the wrong direction as the fault - after fighting it for a very long time.
While that certainly is a good reason to shut down the trim - it is not a trim runaway. Then what exactly is going to work opposite to what it should? Manual trim wheel??