FGD135,
All been stated in a previous thread but my estimation would be,
CAA: 5% for lack of proper oversight, although I do believe there
was an airline inspector scheduled to travel on the flight but had to pull
out due to family circumstance. I very much doubt the flight would
have been conducted the way it was if it was known a CAA inspector
was onboard.
Company: 10% for sloppy operating procedures, and not following up on
reports of low flying. An invitation from a McMurdo Radar operator to
perform a low level run surely does not overide CAA regs or Co SOPs.
Crew: 85% for not complying with either CAA requirements for these flights
or company SOP's, and for not confirming their position before
commencing descent. If even just one of the mandatory requirements
for descent were compled with the accident would have been avoided.
The tools for getting a precise position were available to them prior to
descent, and as this was their first flight to the ice one would have
thought a high degreee of caution would have been the order of the day.