Investigation Summary
The flight was the third leg of a multi-stop route from Cairns to Bamaga and back. During the approach to Lockhart River, the crew utilized an RNAV (GNSS) approach for Runway 12. The copilot lacked the required endorsement for this specific approach type, and the pilot in command had a documented history of operating at speeds exceeding the company's operations manual. The aircraft commenced its initial descent from the intermediate fix (LHRWI) 3.1 nautical miles early. After briefly leveling at 3,000 feet, the crew selected 18 degrees of flaps and recommenced the final descent 0.3 nautical miles (approximately 7 seconds) after the specified descent point for the constant angle approach path. The aircraft maintained an average descent rate of 1,000 feet per minute, which increased to 1,700 feet per minute. At the Final Approach Fix (FAF), the aircraft was at 2,379 feet, nearly 500 feet below the required altitude of 2,860 feet. The crew failed to level off at the segment minimum safe altitude of 2,060 feet, continuing the descent until impact. The investigation was hampered by an unserviceable cockpit voice recorder, which had been non-functional for some time prior to the accident.
Final Conclusions
The Australian Transport Safety Bureau (ATSB) concluded that the primary cause was controlled flight into terrain. Contributing factors included the crew's loss of situational awareness, excessive approach speeds, and a high workload environment. The investigation highlighted significant deficiencies in Transair's training programs, which lacked formal instruction on GPS use, CFIT risk mitigation, and Crew Resource Management (CRM). While the aircraft was equipped with a basic Ground Proximity Warning System (GPWS), the ATSB noted that Transair had not installed a more advanced Terrain Awareness and Warning System (TAWS/EGPWS), which provides enhanced look-ahead capabilities. The report also criticized the Civil Aviation Safety Authority (CASA) for inadequate oversight of the operator's safety standards.
Video Analysis
The Lockhart River Air Disaster | Mini Air Crash Investigation — A detailed look at the 2005 Fairchild Metroliner crash in Queensland, exploring the pilot errors and systemic safety failures that led to Australia's worst air disaster in decades.
If playback is blocked, the owner has disabled embedding — use the link above.
Airframe & Maintenance
Systems & Failure Modes
RNAV (GNSS) Approach
A satellite-based instrument approach. The crew lacked proper training and endorsements for this specific procedure at Lockhart River.
Cockpit Voice Recorder (CVR)
A device designed to record flight deck audio; it was found to be unserviceable, preventing investigators from analyzing crew coordination.
Ground Proximity Warning System (GPWS)
A system designed to alert pilots of imminent contact with the ground. The ATSB noted that if functioning, it should have provided warnings, but its operation could not be confirmed due to the failed CVR.
Terrain Awareness and Warning System (TAWS)
An advanced safety system (EGPWS) with look-ahead terrain database capabilities; the aircraft was not equipped with this technology, which might have provided earlier warning than the basic GPWS.
Interesting Facts
- 01The accident was the deadliest air crash in Australia since 1968.
- 02The cockpit voice recorder (CVR) was unserviceable at the time of the crash and had been for a significant period.
- 03The aircraft was flying at descent rates of up to 1,700 feet per minute during the final approach phase.
- 04The impact occurred 90 feet below the crest of the South Pap ridge.
Safety Actions & Advisories
Senate Inquiry Recommendations
Source ↗Recommended strengthening CASA's governance with a five-member board and auditing the implementation of Safety Management Systems.
Regulatory Reform
CASA was urged to conclude its Regulatory Reform Program to provide certainty to the industry and address safety challenges.
Known Controversies & Unanswered Questions
Criticism of Coroner's Findings
Reference ↗Families of the victims were highly critical of the 2007 Coroner's Inquest, arguing it focused too heavily on pilot error while downplaying the role of the regulator (CASA) and the operator's poor safety culture.