The aircraft was engaged on a newspaper delivery flight from Adelaide to Whyalla with intermediate stops at
Port Lincoln and Port Pirie. One passenger was carried.
Examination of the wreckage indicated that the aircraft
had first contacted rising ground on a northerly heading, in a climbing attitude and with the wings level. It had
then slid uphill for some 130 metres before coming to rest. The accident site was 414 feet above the elevation of
the aerodrome. Both propellers were rotating at the time of impact and there was no evidence that the engines
were not capable of delivering normal power. The landing gear was retracted and the flaps were fully up.
Significant right rudder trim and right wing down aileron trim were set, indicating that an asymmetric power
condition had been adopted during the flight.