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 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.
The advice to control pitch using electric trim has been in the NNC for 19 years now. It is number 2 memory item. Furthermore, the amplifying remarks promulgated with the AD were a de facto amendment to the FCOM that the operators were required to action within 3 days.