Originally Posted by
b1lanc
So what you are saying is that all pre-Max versions of the 737 are unsafe? I don't think that is what the 'article' is implying. Has there ever been a non-Max 737 crash caused by inability of the crew to trim the horizontal stab?
Just because it hasn’t caused a crash doesn’t mean it’s okay. After the A330/QF72, the Iberia Bilbao crash, the DLH Bilbao incident Airbus changed the programming/procedures to prevent these things from happening again. None of these had any fatalities, but it was enough to change things. Two B737s have crashed, in both the runaway trim part was caused by something new, but it seems likely at least one crew was unable to manually trim the aircraft before they left the envelope. There have been several videos of sim sessions showing just how hard it is to manually trim once you get very AND and high speed. These were in NG sims, and Boeing has just admitted the sims underscore the severity. I think Boeing should at least reconsider the procedure where you always switch both trim switches off, and rewire the max back to the NG way, so pilots have the electric manual trim option without the automatic electric trim.