PM me if you like John. I flew for AAC and Peter Benton was a friend. Yes our CASA friends blamed him. Nothing to do with a hole in a piston.
It did bring out some interesting facts on the age of the airframe and the subsequent effect on performance. These things are a further 30 years old now. There is a 1968 Navajo going strong on the Sunshine coast. The age of these aeroplanes is a worry.