What happened
During a cruise phase flight in marginal weather with low visibility, the aircraft deviated significantly from its intended track. At the time of the accident, the plane was off course by 100 miles. The aircraft subsequently collided with the slope of Square Peak, which has an elevation of 4,600 feet, in the region of Quirindi. Rescue teams located the wreckage several hours after the impact. All 13 occupants on board were killed in the crash.
Findings
Official investigations were unable to determine the exact cause of the accident with absolute certainty. However, the inquiry concluded that the probable cause involved a combination of technical and procedural failures. Primary factors included interference with the airplane's magnetic compass resulting from a nearby electrical storm. Additionally, a defect in the navigational signals transmitted by the Government-maintained Kempsey low-frequency radio range station contributed to the incident. This station served as a critical navigational aid for flights operating in the area. The investigation also identified errors and deficiencies in the aeronautical charts used for navigating the mountainous terrain.