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Last updated: 19 November 2018
Statuts:Enquête Officielle
Date:dimanche 2 août 2009
Heure:ca 11:00
Type/Sous-type:Silhouette image of generic DHC6 model; specific model in this crash may look slightly different
de Havilland Canada DHC-6 Twin Otter 300
Compagnie:Merpati Nusantara Airlines
Immatriculation: PK-NVC
Numéro de série: 626
Année de Fabrication: 1979-05-30 (30 years 2 months)
Heures de vol:27336
Moteurs: 2 Pratt & Whitney Canada PT6A-27
Equipage:victimes: 3 / à bord: 3
Passagers:victimes: 12 / à bord: 12
Total:victimes: 15 / à bord: 15
Dégats de l'appareil: Détruit
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:42 km (26.3 milles) N of Oksibil Airport (OKL) (   Indonésie)
Élévation des lieux de l'accident: 2834 m (9298 feet) amsl
Phase de vol: En vol (ENR)
Nature:Transport de Passagers Nat.
Aéroport de départ:Jayapura-Sentani Airport (DJJ/WAJJ), Indonésie
Aéroport de destination:Oksibil Airport (OKL/WAJO), Indonésie
Numéro de vol:MZ9760D
Détails:
A Merpati Nusantara Airlines DHC-6 Twin Otter passenger plane was destroyed when it flew into the side of a mountain during a domestic flight from Jayapura (DJJ) to Oksibil Airport (OKL). Merpati Flight MZ9760D took off at 10:15 with an estimated time of arrival at Oksibil of 11:05. The pilots were operating under visual flight rules (VFR) procedures. This required them to remain clear of cloud. Ten minutes before impact the pilot in command mentioned climbing to 10,000 feet, and stated "if we cannot go visual I will turn left". The cockpit conversations did not exhibit any signs of stress or concern until two minutes before the impact, when the copilot mentioned haze and asked the captain if he could see. Fifty seconds before impact, the copilot expressed further concern and asked about the captain's intentions, and the captain said "climb, to the left". Forty-two seconds before impact the copilot asked if it was safe on the left.
The copilot became increasingly uncertain about the safety of the flight, specifically mentioning visibility and speed. From the recorded sounds, it is apparent that 13 seconds before impact, engine power was increased symmetrically to a high power setting. The Twin Otter struck the side of a mountain at an elevation of 9300 feet.
The wreckage was located August 4 with some difficulty because the ELT was unserviceable.

Probable Cause:

CAUSES: "The pilots did not maintain visual flight procedures when flying below lowest safe altitude, and the aircraft was flown into cloud in the vicinity of gap north west of Oksibil. The accident was consistent with controlled flight into terrain."

Accident investigation:
cover
Investigating agency: NTSC Indonesia
Status: Investigation completed
Duration: 262 days (9 months)
Accident number: KNKT.09.08.21.04
Download report: Final report

Sources:
» SKYbrary 
» Departemen Perhubungan news releases
» Inilah Nama Penumpang dan Awak Merpati yang Hilang di Papua (Kompas, 2-8-2009)
» All 15 On Crashed Papua Plane Are Dead: Airline Director (Jakarta Globe, 5-8-2009)


Opérations de secours

NTSC issued 4 Safety Recommendations

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Photos

photo of de Havilland Canada DHC-6 Twin Otter 300 PK-NVC
photo of de Havilland Canada DHC-6 Twin Otter 300 PK-NVC
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Aircraft history
date registration operator remarks
30 MAY 1979 PH-SAY de Havilland Canada first flight
21 JUN 1979 PH-SAY Schreiner Airways delivered
21 AUG 1984 N5467X Crown Air
23 OCT 1986 PH-SAY Schreiner Airways registered
19 DEC 1986 9M-PEG Pelangi Air
APR 1990 9M-BMM Boskym Udara
10 NOV 2006 PK-NVC Merpati Nusantara Airlines registered

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 Jayapura-Sentani Airport et Oksibil Airport est de 258 km (161 miles).
Accident location: Exact; as reported in the official accident report.

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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DHC-6 Twin Otter

  • 930+ built
  • 259ème loss
  • 169ème accident fatal
  • le accident 31ème le plus grave (à ce moment là)
  • le accident 35ème le plus grave (en ce moment)
» safety profile

 Indonésie
  • le accident 42ème le plus grave (à ce moment là)
  • le accident 49ème le plus grave (en ce moment)
» safety profile