6 fatalities

Fatal aircraft impact on Mount Nang Keo (12251)

Mt Nang Keo, ThailandFlight

On March 24, 1970, a De Havilland DHC-4 Caribou (registration 12251) operated by Royal Thai Police (Tamruat Haeng Chat) was involved in an aviation accident near Mt Nang Keo, Thailand in flight. 6 people were killed. Investigators recorded the probable cause as: The aircraft struck the slope of Mt Nang Keo during a mission for the Royal Thai Border Police. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 3 related events involving the same aircraft type or operator are linked below.

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Primary reportUpdated 2026-06-12Data APIEditorial standards

An aircraft operating for the Royal Thai Border Police crashed into a mountainside, resulting in no survivors.

What happened

During an operational mission conducted for the Royal Thai Border Police, an aircraft collided with the terrain at Mt Nang Keo. The impact occurred while the plane was navigating the mountainous region, leading to a high-speed collision with the slope.

All six individuals on board the aircraft lost their lives in the accident. There were no survivors recovered from the wreckage following the crash event.

Findings

No specific technical failures or external factors were detailed regarding the impact, though the primary factor was the collision with the mountain slope during the mission.

Probable cause

The aircraft struck the slope of Mt Nang Keo during a mission for the Royal Thai Border Police.