PPRuNe Forums - View Single Post - Ethiopian airliner down in Africa
View Single Post
Old 8th Apr 2019, 16:39
  #3637 (permalink)  
Lost in Saigon
 
Join Date: Jul 2004
Location: Found in Toronto
Posts: 615
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by edmundronald
Why not just disable MCAS, leave the pilots to trim as usual, and retrain them a bit to deal with the feel of the plane at a high AoA?
Zero software to write, and no new bugs introduced.
Because as they say in the industry, new features always means new bugs.


Edmund
It is pretty basic. An aircraft has to fly like an aircraft. If you pull the nose up, and then release back pressure, the nose must return to somewhere near the original attitude and speed. If you disable MCAS, the B737 MAX will not meet the FAA stability requirements of Sec. 25.173 (Static longitudinal stability)

I suspect that without MCAS there would need to be a major aerodynamic redesign to meet the stability requirements.
Lost in Saigon is offline