Actually I was there when he explained that he had made a mistake (OK, not a cock-up) - and that had helped him to realise the significant difference between human factors mistakes (no-one is 100% perfect) and reckless behaviour (idiots deliberately disobeying clear orders). He said this in front of an audience of aircrew - we all respected him for that. Top bloke - and still is!
Reason for the initial cause of the problem hasn't been established.
I suspect that we agree!
Back to the F4......