The way it unfolded looks more like a dismissal than a resignation. None of the usual 'spending more time with family', seeking a new challenge', or 'taking advantage of an exciting new opportunity' comments. In fact, no comments at all at this stage. This is going to rattle quite a few in the organisation. He was promoted to the extent that people thought he was to be the saviour of the airline & now he's out so quick that you would have missed it if you blinked. Interesting times ahead.