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Accident
Last updated: 18 November 2017
Statuts:Enquête Officielle
Date:dimanche 16 février 2014
Heure:ca 13:30
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:Nepal Airlines
Immatriculation: 9N-ABB
Numéro de série: 302
Année de Fabrication: 1971
Heures de vol:43947
Cycles:74217
Moteurs: 2 Pratt & Whitney Canada PT6A-27
Equipage:victimes: 3 / à bord: 3
Passagers:victimes: 15 / à bord: 15
Total:victimes: 18 / à bord: 18
Dégats de l'appareil: Détruit
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:7 km (4.4 milles) NW of Sandhikhark (   Népal)
Élévation des lieux de l'accident: 2192 m (7192 feet) amsl
Phase de vol: En vol (ENR)
Nature:Transport de Passagers Nat.
Aéroport de départ:Pokhara Airport (PKR/VNPK), Népal
Aéroport de destination:Jumla Airport (JUM/VNJL), Népal
Numéro de vol: 183
Détails:
A de Havilland Canada DHC-6 Twin Otter operated by Nepal Airlines was destroyed when it impacted a mountainside near Sandhikhark, Nepal. All 18 on board sustained fatal injuries.
Flight RA183 was a domestic flight from Kathmandu to Jumla with a refueling stop at Pokhara. The airplane took off from Pokhara at 12:43. Upon leaving Pokhara Control Zone, the pilot in command realized that the direct track was not possible due weather and decided to proceed via a more southern track. During the flight the pilots were experiencing uncomfortable flying environment due to unfavorable weather conditions. Attempting to avoid the weather, the pilots had to fly up and down and changing the heading. Finally being unable to penetrate the weather ahead, the captain decided to divert to Bhairahawa, the nearest airport. However, the captain did not take into consideration the surrounding terrain and continued descent turning right.
The aircraft initially slashed a small tree and finally impacted a ridge. Due to the heavy impact the left wing was first disintegrated and then the front part of the aircraft toppled over beyond the ridge with several subsequent impacts.

The cockpit voice recorder showed that the copilot had warned the captain not to descend or turn.
The wreckage was located the following morning at an altitude of 7190 feet (2192 m). There were no surivors.

Probable Cause:

Causes:
After detail investigation and thorough analysis of the circumstances and evidences, the Commission has determined that the most probable causes of the accident is the
"Losing situational awareness on the part of PIC while flying into instrument meteorological weather condition to the extent of Collision with terrain."
The contributing factors to the occurrence are;
- Deteriorated weather associated with western disturbance, unstable in nature and embedded CB.
- Inappropriate and insufficient crew coordination while changing course of action.

Accident investigation:
cover
Investigating agency: AAIC Nepal
Status: Investigation completed
Duration: 190 days (6 months)
Accident number: Final report
Download report: Final report

Sources:
» ekantipur.com
» Nepali Times
» Hemant Arjyal
» SKYbrary 


Opérations de secours

Nepal AAIC issued 11 Safety Recommendations

Show all AD's and Safety Recommendations

Photos

photo of de Havilland Canada DHC-6 Twin Otter 300 9N-ABB
photo of de Havilland Canada DHC-6 Twin Otter 300 9N-ABB
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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 Pokhara Airport et Jumla Airport est de 213 km (133 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

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