Rescuers found the 12-year-old daughter's body in the plane’s passenger area and wife Misty’s floating 4 kilometres west of Venice’s shore.
The organisation said it understood the next of kin “wanted answers” but had to allocate its resources towards cases that would generate the “greatest public safety benefit”.
The incident took place just before 3pm on Wednesday, with the wreckage of the two aircraft being found 200 metres apart in a paddock at Kybong, near Gympie.
In 1951, the Catalina completed the first return flight from Australia to South America. The aircraft was piloted by Sir Patrick Gordon Taylor, his two-week journey was the first crossing of the South Pacific Ocean and a vital step in expanding the global aviation network.
The incident occurred in June last year while the pilot conducted circuits at Moorabbin Airport, in Melbourne’s southeast. The aircraft hit trees before crashing into the ground.
Deakin University study was conducted on the hypothesis that “thrill-seeking” executives would be more likely to take risks