mjoelnir wrote:IMO the Ethiopian crash with MCAS pushing the frame into a dive, showed up the underlying fragility of the 737 trimming system. Manual trimming just did not have enough authority to save the plane. Yes, the 737NG has an exemplary safety record, but it could be many years of luck that the wholes never aligned. The frame never been pushed into the areas of the flight envelop where the deficiencies of the manual trim system mattered.
I would assume a review of the complete trim system, should be part of recertifying the 737MAX.
It’s a question of how easy (and likely) it is for the plane to get “pushed into the areas of the flight envelop where the deficiencies of the manual trim system mattered.”
MCAS was (likely inadventrely on Boeing’s part through poor software that was never thought through) pushing the plane into that area. The question is with the software fix and proper training how likely is it to get into a situation wheee you can overcome the trim? I suppose a 737 pilot today can push the 737NG into a situation where they could not recover, but that (based on the 737NG’s service history) would require either deliberate action or seriously poor pilot training.