Fordy,
Apparently it isn't rocket science -
Post #7 in this thread to start?
He turns out to be ex-AAC (UK) who was a door-gunner turned pilot and reknowned for being a serial bullsh*tter.
He will have had no experience of flying the Wessex and is hardly a subject matter expert to be relied on by the NZCAA.
Shocking that he fooled so many in such an important role.