Chippendale did nothing wrong. The crew broke the AirNZ SOPs, he saw them as responsible for putting the aircraft where they did. The buck stopped there.
Wow - the buck stopped with the crew? You obviously know little about the crash or have your head in the sand (snow?). That way of thinking goes back to the old days prior to things like HFACS etc were developed to explain the latent organisational problems that contributed to the accident.