Re:Lion Air crash: Investigators say plane was 'not airworthy'
by ithinkinstereo on Wednesday November 28, 2018 @08:53AM
(#18551410)
From what I understand from reading PPrune forums, pulling the circuit breaker for trim irregularities is the de facto standard operating procedure on the 737, and has been for over a decade+.
Hopefully they find the CVR and that gives us more insight into what the crew was thinking. It is odd that the pilots struggled with trim controls for ~11 minutes and didn't think to disable it.
The media has focused on the new MCAS system on the 737-Max, but I think that is somewhat irrelevant, considering that the procedures for addressing trim irregularities non-Max models are the same: pull the trim circuit breaker.
As a pilot, if my plane is doing something which I don't expect it to - my first thought isn't to disable auto-trim, but to consider why it's doing that. A previous crew did have the issue, and did report the problem. As a pilot, I trust that it has been fixed, so no, it wouldn't be the first thing on my mind.