I, for one, would be very surprised if the CAA decided that bunk hours didn't contribute to total hours. The aviation medical profession have already gone public and said it is not the hours of work so much as the time zone changes that put the body clock out of 'sync' and that is a major contributor towards fatigue.
I think it may have been NASA that said that every time zone crossed, over three hours different from departure, should equate to one day off at destination!!!
Hardly likely to happen either but I would expect BALPA to bring all their big medical guns to bear if any airline management tried this stunt, (discounting bunk hours).
IMHO 900 hours a year on the B744 is not excessive, been there, done that etc. but 900 is about the upper limit I would say.
[ 27 November 2001: Message edited by: G.Khan ]