Originally Posted by Bergerie1
May I ask two questions:-
1. Why are we discussing spins when no one knows whether the Air Asia aircraft ever got into a spin?
2. How many large commercial jet aircraft have ever got into a spin?
It seems to me that the discussion is taking a wrong turn.
1 The answer to #1 is that it appears to fit the impact conditions very well. See
http://www.pprune.org/rumours-news/553569-air-asia-indonesia-lost-contact-surabaya-singapore-109.html#post8830502 At this point, it is just a theory until confirmed or denied by the accident investigation.
2. If it has wings, it can depart into a spin. Ask yourself what would happen to your twin underwing engine jet if it pitched up for some inappropriate reason and then compressor stalled one engine at an inopportune time due to the high transient AOA.