[Cap'n Wannabe]

Australia's Civil Aviation Safety Authority says the plane that crashed into the Swan River during the Perth Skyshow on Thursday was not approved to fly below 500 feet.

This certainly sounds like a CYA event...from what I can gather, the aircraft was turning onto final. I'm not up on seaplane ops, but one could assume that that being the case, the pilot had every reason to be below 500 feet..