Originally Posted by
Mad (Flt) Scientist
I would be very cautious in concluding anything about actual aircraft system behaviour, in an abnormal condition, from behaviour observed in a simulator whose intent is training not engineering investigation.
Amen to that one. Years ago there was a departure out of EWR with a conditional waypoint that somehow cancelled the speed limit below 10,000 feet. We were getting line checked and I mentioned in the pre-takeoff brief that we might have to manually intervene. The check airman said that we must be using the automation incorrectly. It was a Boeing and we left it in LNAV and VNAV for the departure and as soon as we hit the waypoint the speed bug went to the barber pole. 'It sure doesn't do that in the simulator!' was the check airman's comment.