Originally Posted by
oggers
I think we can agree that it is easier to hold the trim switch with the stick shaker off. Nonetheless, the data shows clearly that the thumb switch can be held closed with the stick shaker on.
But the Lion Air data also shows "off-blips" during automatic trim every now and then,
Nope. There is a clear temporary loss of input in many of the manual, but none of the automatic commands. The latter show only "ragged" flanks.
Lionair Upper: manual trim middle: automatic trim
On the ET FDR PF asks PNF to help him with the manual electric trim. So he may have had difficulties actuating his thumb switch.