A charity that flies sick children from regional areas to the city for crucial medical treatment has hit back at claims it has a fatal accident rate seven times higher than other private flights.
The report comes from the Australian Transport Safety Bureau, which is investigating the safety of Angel Flight compared to other private flying operations, after a second fatal accident in the past decade.
Earlier in the year, Angel Flight revealed in the last decade the charity has coordinated more than 1000 flights for Wagga residents.
A spokesperson for the charity said it engaged two senior expert statisticians and an analyst, all of whom concluded that the rate was not significantly different than other private airlines.
"The ATSB also chose to compare only the passenger-carrying sectors of flights coordinated by the charity," they said.
"It disregarded the flights ... where the aircraft flew from home base to the city collection points, the return trips back to base, and the positioning flights to collect passengers from their own home towns.
"It did, however, include those flights when reporting 'occurrences' against the charity flights."
The statement added that the ATSB had not adopted its own protocols of counting flight hours for general aviation accidents - instead, it counted only flight numbers.
"To disregard both the actual flight numbers and the flight hours, compounds the errors and unreliability of the findings to an extraordinary degree," the spokesperson said.
Angel Flight expressed frustration it was not acknowledged that all volunteers are CASA-licensed, CASA-trained, and CASA-tested at least every two years.
The charity also shut down the recommendation that it should book people on airlines for travel, claiming it did not factor in cost, flight schedules in regional areas and the strain on families.
It added, it uses airline flights where practicable and necessary, and will continue to utilise these services.
The ATSB report stated Angel Flight pilots were more likely to make operational errors when compared to other private operations.
"This investigation has shown that those conducted for Angel Flight are actually less safe than other private operations, let alone charter and scheduled airline flying," Commissioner Hood said.
The ATSB reported stated that it considered flight hours as a normaliser, however, were assessed as more limited in answering the safety objectives.
John Smith, captain of flying at Wagga City Aero Club, questioned the report, labelling the data as "rubbish".
Mr Smith has been a pilot for 45 years, volunteering on and off with Angel Flight.
"It's very damming and very irresponsible of a department with that much power," he said.
"It would be a real shame if Angel Flight has to close down because of this discrimination.
"It's discriminatory against country people because city people have all the medical services at their fingertips."
Mr Smith added that commercial operations would benefit from the charity operator being shut down.