There is a difference in the two reports upon the cause of the accident.
Mr Chippindale considered the probable cause to have been pilot error.
On the other hand the Royal Commission exonerated the pilots completely
and spoke instead of "incompetent administrative airline procedures".
Since this case is concerned with allegations by the Commissioner that
the affected officers of Air New Zealand had engaged "in a
pre-determined plan of deception ... to conceal a series of disastrous
administrative blunders" (administrative mistakes which he himself had
found to be the real cause of the disaster) it is not unimportant to ask
what relevant information the airline had actually been able to provide
which was not supplied to Mr Chippindale. For that last reason the
material made available for consideration by Mr Chippindale deserves
some examination. An example concerns the change made to the final stage
of the computer flight track to the Antarctic which the Commissioner
regarded as a central reason for the accident. During a period of
fourteen months prior to the fatal flight Air New Zealand's ground
computer had contained an incorrect geographical reference to the
southern waypoint of the journey at McMurdo. Accordingly, in that period
it was shown incorrectly on any computer print-outs of the flight plan.
But a few hours before departure of the DC10 an amendment was made and
the flight crew was not informed that amended co-ordinates (since their
briefing 19 days earlier) had thus been fed into the aircraft's
computer.

In paragraph 44 the Report explains that the chief executive of the
airline was told of this matter on 30th November. Then in paragraph 45
it is said that the chief executive "determined that no word of this
incredible blunder was to become publicly known". There follows a
statement that a direction was thereupon given "that all documents