Investigation Summary
Flight 592 was a scheduled service from Johannesburg to Amsterdam. At 10:38 local time, during the leg from Rome to Frankfurt, the crew reported being over the Staden beacon at 4,000 feet. Seven minutes later, they reported approaching the Offenbach beacon and descending to 2,460 feet. This was the final transmission from the aircraft. Approximately five minutes after this call, the DC-6 struck a forest. A local lorry driver, Willi Hoffman, reached the scene and used a pocket knife to cut survivors from the burning wreckage. Despite these efforts, the intensity of the post-crash fire and the severity of injuries led to the deaths of most of those rescued. The only two long-term survivors were women: a German passenger and a KLM ground hostess who had been traveling as a passenger. The hostess was returning from her honeymoon; her husband was killed in the crash.
Final Conclusions
The official investigation ended with the cause undetermined. However, the circumstances strongly suggest a Controlled Flight Into Terrain (CFIT) event. The prevailing theory is that the flight crew continued their descent below the prescribed minimum descent altitude (MDA) while attempting to establish or maintain visual reference with the ground in conditions of poor visibility. No evidence of mechanical failure was found in the limited wreckage analysis possible at the time.
Photographic Evidence (1)
Video Analysis
Every Worst KLM Accident in History Explained — A chronological overview of major KLM accidents, including the 1952 crash of Flight 592 in Frankfurt.
If playback is blocked, the owner has disabled embedding — use the link above.
Systems & Failure Modes
Offenbach Beacon
A non-directional beacon (NDB) used for navigation during the approach to Frankfurt.
Altimeter
The primary instrument for determining altitude; its potential misreading or miscalibration is often cited in CFIT investigations.
Interesting Facts
- 01The aircraft was named Koningin Juliana.
- 02The aircraft was scheduled to carry Queen Juliana and Prince Bernhard to the United States for a state visit the following week.
- 03At the time, it was the fourth deadliest accident involving a Douglas DC-6.
- 04Six people were initially pulled alive from the wreckage, but four died later due to injuries.
- 05The crash site was located approximately 7 km (4.3 miles) northeast of the airport.
- 06The aircraft's Manufacturer Serial Number (MSN) was 43114/102, manufactured in 1948.
- 0723 of the deceased passengers were South African nationals.
Safety Actions & Advisories
Minimum Safe Altitude Adherence
The accident reinforced the critical importance of strict adherence to Minimum Safe Altitudes (MSA) and instrument procedures during poor weather approaches.