I remember that event. Much Laughter on the part of those not involved! However a lot of folks sure noted the causal circumstances and learned from it.
In this case they mention “
As he did so, the helicopter unexpectedly yawed towards the high ground. When a further selection was made on the AFCS to effect a go-around, the helicopter accelerated towards the terrain while maintaining height.” Does this perhaps mean the go-Around button was pushed which would, in some helicopters, cause the aircraft to roll wings level and commence a climb straight ahead?
Originally Posted by
212man
Personally, I think that is more the issue, based on inadequate knowledge of the system functions. This accident (
https://aviation-safety.net/wikibase/72613) in 1985 wasn't even using the upper modes, it was the TRE trying to demonstrate the inherent heading hold function of the ATT mode, by lifting into the hover with feet away from the micro-switches on the pedals. Problem was, they had already been released on a different heading, and the aircraft turned without them being depressed again. So, as it lifted, it turned onto the memorised heading.......as it was designed to.