Yet another news article on the incident
'Prime Minister should have a dedicated aircraft'. 'Gallipoli-not as dangerous'
I'd need to take the gloves and socks off at least 3 other people as well as my own, just to count the amount of times I have had an Aztec door come open in flight. According to my former boss/engineer, 'The Door will not fully open in flight unless it has not been closed properly', and 'You can fly with the door ajar, it will not affect the controllability of the aircraft'.
Saying that, I do recall reading an article in either a Vector or Wings magazine regarding a pilot having to make an emergency landing due to the shocking door system of the Aztec's.
Maybe he had the same problem...