Once again, Justice Mahon was not an Accident Investigator, it was a legal opinion, it could not be appealed. Following is what his peers thought of his findings.
And 36 years ago this was the finding of the Privy Council.
In their judgement, delivered on 20 October 1983, the five Law Lords of the Privy council dismissed the Commissioners appeal and upheld the Court of Appeals decision, which set aside costs order against the airline, on the grounds that Mahon had committed clear breaches of natural justice. They demolished his case item by item, including exhibit 164 which they said could not "be understood by any experienced pilot to be intended to be used for the purpose of navigation", and went even further, saying there was no clear proof on which to base a finding that a plan of deception, led by the company's chief executive, had ever existed."
You will note, committed clear breaches of natural justice, a ruling by his own peers that he could not run a commission of enquiry in his own field, yet he could make a ruling in a field in which he had no expertise whatsoever.
And further to the findings of the Privy Council.
Citing his own action when alleged to be in the wrong, Morrie Davis called upon Mahon to resign as a High Court Judge, which he did.