Originally Posted by
hoss
STS trimming down 10 seconds for a second time = RUNAWAY STABILIZER no if’s or but’s.....
(STAB TRIM CUTOUT switches should have been an instinctive ‘go to’, stay in manual flight and land)
Standards and Training at these two airlines should be under the spotlight!
Thats what the ET302 crew actually did. The one thing they didn’t do was dis-engage the A/T and allow the speed to build up but whether that was due to distraction from multiple warnings sounding or the struggle to pitch the nose up I’m not sure.
The other thing a lot of people are discounting is the stickshaker that activated for the entire time they were airborne. Whilst it’s easy to look back now and say “they should’ve ignored it because it was obviously erroneous” they couldn’t really detect that at the time. Multiple problems evolving and it becomes a matter of investigation and prioritisation. Their thought may have been to use the Stab Trim Cutout switches to stop the random Stab movement, but increase speed in case the stickshaker warning was legitimate, and a speed increase might resolve it? We’ll never know for sure. It was a terrible situation they were put into and I’m not sure all Western pilots would’ve coped better in an identical scenario.