[Tzfat]

I think the least likely is pilot suicide. Theft, flight deck fire, and hijack are all plausible. As well, an “accidental” shoot down by one of the countries within 7 hours of KUL.

[zipper]

I think the least likely is pilot suicide. Theft, flight deck fire, and hijack are all plausible. As well, an “accidental” shoot down by one of the countries within 7 hours of KUL

Okay then, my list at this moment:

1) hijack

2) stolen by crew (one or both)

3) pilot rage ending in suicide or crash

4) sabotage ending in crash

5) catastrophic systems failure (electrical fire, structural failure)

6) remote recall by Boeing for warranty ignition switch replacement

[usconservative]

I think the least likely is pilot suicide.

Given the pilot's wife and family left him the day before the flight, I'm not so sure I'd rule pilot suicide out.