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4 fatalities

Charter Flight Collides with Mount Deyjay, Killing Four (PK-YNM)

Mt Deyjay, IndonesiaFlight

On November 4, 1994, a De Havilland DHC-6 Twin Otter (registration PK-YNM) operated by Trigana Air Service was involved in an aviation accident near Mt Deyjay, Indonesia in flight. 4 people were killed. Investigators recorded the probable cause as: Controlled flight into terrain. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 8 related events involving the same aircraft type or operator are linked below.

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Source recordUpdated 2026-07-04Data APIEditorial standards

A twin engine charter flight from Nabire to Obano struck Mount Deyjay while approaching in clouds, killing all four occupants. The probable cause was determined to be controlled flight into terrain.

Accident Details

A twin engine aircraft was completing a charter flight from Nabire to Obano, carrying two passengers and two pilots. The flight was operated on behalf of the Nabire Bakti Mining Company. During the approach to the destination, the crew encountered clouds. Shortly thereafter, the aircraft collided with Mount Deyjay, which has an elevation of 2,115 meters and is located approximately 8 kilometers southwest of Obano. The impact resulted in the deaths of all four individuals on board.

Investigation and Probable Cause

Investigators determined that the accident was a controlled flight into terrain (CFIT). The official probable cause was stated as controlled flight into terrain.

Controlled flight into terrain

Related events

Same operator

Frequently asked questions

What happened in the 4 Nov 1994 De Havilland DHC-6 Twin Otter accident near Mt Deyjay, Indonesia?

A twin engine charter flight from Nabire to Obano struck Mount Deyjay while approaching in clouds, killing all four occupants. The probable cause was determined to be controlled flight into terrain.

Were there any fatalities in the 4 Nov 1994 De Havilland DHC-6 Twin Otter accident?

The accident was fatal, resulting in 4 fatalities.

What aircraft was involved and where did it happen?

The accident on 4 Nov 1994 involved a De Havilland DHC-6 Twin Otter, registration PK-YNM, operated by Trigana Air Service, at Mt Deyjay, Indonesia.

What was the probable cause of the accident?

Controlled flight into terrain

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