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Accident
Last updated: 18 October 2017
Statuts:Enquête Officielle
Date:vendredi 1 juin 2007
Type/Sous-type:Silhouette image of generic DHC6 model; specific model in this crash may look slightly different
de Havilland Canada DHC-6-300 Twin Otter
Compagnie:Trigana Air Service
Immatriculation: PK-YRU
Numéro de série: 685
Année de Fabrication: 1980
Moteurs: 2 Pratt & Whitney Canada PT6A-27
Equipage:victimes: 0 / à bord: 2
Passagers:victimes: 0 / à bord: 1
Total:victimes: 0 / à bord: 3
Dégats de l'appareil: Substantiels
Conséquences: Repaired
Lieu de l'accident:Mulia Airport (LII) (   Indonésie)
Phase de vol: Au décollage (TOF)
Nature:Transport de Passagers Nat.
Aéroport de départ:Mulia Airport (LII/WABQ), Indonésie
Aéroport de destination:Wamena Airport (WMX/WAJW), Indonésie
Détails:
On Friday 1 June 2007, a Twin Otter, registered PK-YRU overran the right side of the runway at Mulia Airport (LII). Indonesia during the takeoff roll.
The aircraft left the runway and impacted a ditch and rocks on the right shoulder of the runway. Main-wheel tire marks for more than 65 meters on the runway indicated that heavy braking action was being applied to the left brake. The aircraft was substantially damaged. None of the occupants were injured.
The handling pilot was undergoing captaincy training under the supervision of an instructor. The investigation was unable to determine why the aircraft commenced veering to the right during the early acceleration phase of the takeoff. The pilots continued the takeoff and directional control was lost during the takeoff roll. The instructor pilot was unable to regain directional control of the aircraft before it left the runway. No aircraft or system defect was found that could have contributed to the pilots’ inability to maintain directional control during the takeoff roll. The pilot under training stated that "things happened fast" and he was "unaware that the power levers were still in the full on position", but was "conscious that his left hand was on the steering handle". He said that he did not immediately respond to a shout from the instructor to not use the steering handle.

Probable Cause:

CAUSES: "The investigation considered that it was possible that the nose-wheel steering was not centred before commencing the take-off roll and that the pilot under training may have been unaware that he was holding an inappropriate nose-wheel steering position during the take-off roll."

Accident investigation:
cover
Investigating agency: NTSC Indonesia
Status: Investigation completed
Duration: 2 years and 12 months
Accident number: KNKT.07.14.06.04
Download report: Final report


Opérations de secours

NTSC issued 1 Safety Recommendation

Show all AD's and Safety Recommendations

Photos

photo of de Havilland Canada DHC-6-300 Twin Otter PK-YRU
photo of de Havilland Canada DHC-6-300 Twin Otter PK-YRU
photo of de Havilland Canada DHC-6-300 Twin Otter PK-YRU
photo of de Havilland Canada DHC-6-300 Twin Otter PK-YRU
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Plan
Ce plan montre l'aéroport de départ ainsi que la supposée destination du vol. La ligne fixe reliant les deux aéroports n'est pas le plan de vol exact.
La distance entre Mulia Airport et Wamena Airport est de 119 km (74 miles).

Les informations ci-dessus ne représentent pas l'opinion de la 'Flight Safety Foundation' ou de 'Aviation Safety Network' sur les causes de l'accident. Ces informations prélimimaires sont basées sur les faits tel qu'ils sont connus à ce jour.
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