Whiteout and Mt Erebus.
Having flown several resupply missions to McMurdo, as a C130 F/E, on Operation Deep Freeze in the summer of 1978 I do understand how the Air New Zealand crew got into trouble with such catastrophic consequences. No single factor caused the accident, as is almost always the case. What we should all be doing is feeling great sympathy for those whose lives have been shattered by the loss of loved ones and, importantly, learn from the accident. Given the limited rescue capability at McMurdo it is probable that even if the crash had been survivable many would have perished from exposure to the elements before a rescue could have been completed. Playing the blame game 30 years on from the accident does nobody any credit.