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Last updated: 6 December 2021
Status:Definitief
Datum:zondag 2 augustus 2009
Tijd:ca 11:00
Type:Silhouette image of generic DHC6 model; specific model in this crash may look slightly different
de Havilland Canada DHC-6 Twin Otter 300
Luchtvaartmaatschappij:Merpati Nusantara Airlines
Registratie: PK-NVC
Constructienummer: 626
Bouwjaar: 1979-05-30 (30 years 2 months)
Aantal vlieguren:27336
Motoren: 2 Pratt & Whitney Canada PT6A-27
Bemanning:slachtoffers: 3 / inzittenden: 3
Passagiers:slachtoffers: 12 / inzittenden: 12
Totaal:slachtoffers: 15 / inzittenden: 15
Schade: Vernield
Gevolgen: Written off (damaged beyond repair)
Plaats:42 km (26.3 mijl) N of Oksibil Airport (OKL) (   IndonesiŽ)
Fase: Kruisvlucht (ENR)
Soort vlucht:Binnenlandse lijnvlucht
Vliegveld van vertrek:Jayapura-Sentani Airport (DJJ/WAJJ), IndonesiŽ
Vliegveld van aankomst:Oksibil Airport (OKL/WAJO), IndonesiŽ
Vluchtnummer:MZ9760D
Beschrijving:
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

Bronnen:
» 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)


Veiligheidsmaatregelen

NTSC issued 4 Safety Recommendations

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Foto's

photo of DHC-6-Twin-Otter-300-PK-NVC
accident date: 02-08-2009
type: de Havilland Canada DHC-6 Twin Otter 300
registration: PK-NVC
photo of DHC-6-Twin-Otter-300-PK-NVC
accident date: 02-08-2009
type: de Havilland Canada DHC-6 Twin Otter 300
registration: PK-NVC
 

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

Kaart
Deze kaart geeft het vliegveld van vetrek weer en de geplande bestemming van de vlucht. De lijn tussen de vliegvelden geeft niet de exacte vliegroute weer.
De afstand tussen Jayapura-Sentani Airport en Oksibil Airport bedraagt 258 km (161 miles).
Accident location: Exact; as reported in the official accident report.

This information is not presented as the Flight Safety Foundation or the Aviation Safety Networkís opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
languages: languages

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DHC-6 Twin Otter

  • 930+ built
  • 260e ongeval
  • 169e dodelijk ongeval
  • 31e zwaarste ongeval (toen het plaatsvond)
  • 35e zwaarste ongeval (op dit moment)
» safety profile

 IndonesiŽ
  • 44e zwaarste ongeval (toen het plaatsvond)
  • 52e zwaarste ongeval (op dit moment)
» safety profile