Status: Preliminary
Date: 17 NOV 2006
Time: ca 08:00
Type: de Havilland Canada DHC-6 Twin Otter 300
Operator: Trigana Air Service
Registration: PK-YPY
C/n / msn: 535
First flight: 1977-03-29
Engines: 2 Pratt & Whitney Canada PT6A-27
Crew: Fatalities: 3 / Occupants: 3
Passengers: Fatalities: 9 / Occupants: 9
Total: Fatalities: 12 / Occupants: 12
Airplane damage: Written off
Location: near Illaga ( Indonesia )
Phase: En route
Nature: Domestic Non Scheduled Passenger
Departure airport: Mulia Airport (LII), Indonesia
Destination airport: Illaga Airport (ILA/WABL), Indonesia
Narrative:
The Trigana aircraft was chartered by the regency administration to take officials to talk with residents in several districts. It flew into a mountain an altitude of 3,180 metres (10,500 feet). The wreckage was found the next morning.

Sources: Aircraft with 12 aboard missing in Papua (The Jakarta Post, 18-11-2006)
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AIRCRAFT PROFILE DE HAVILLAND CANADA DHC-6 TWIN OTTER
* Last fatal hull-loss accident: 29 JUL 2006 Quantum Leap Skydiving Center N203E, near Sullivan Regional Airport - 6 fatalities
* Total number of DHC-6 hull-losses: 244 losses (219 accidents, 15 other occurrences (sabotage, wind, ground fire) and 10 unknown occurrences)
* 47th worst DHC-6 accident
* Survival rate for all fatal DHC-6 accidents: on average 29,1% of all occupants survived fatal accidents
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OPERATOR PROFILE TRIGANA AIR SERVICE
Domestic airline in Indonesia. Operates ATR-42, DHC-4, DHC-6 Twin Otter and Fokker F-27 aircraft.
* founded: 1991
* Seventh airliner hull-loss accident
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COUNTRY PROFILE INDONESIA
* Last fatal hull-loss accident: 05 SEP 2005 Boeing 737-230 of Mandala Airlines at Medan - 101 fatalities
* 39th worst hull loss accident in Indonesia
* The country is rated Cat. 1 (meeting ICAO standards) in FAA's International Aviation Safety Assessment Program (IASA)