
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.
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.
» Nepali Times
» Hemant Arjyal
» SKYbraryÂ
accident date: 16-02-2014
type: de Havilland Canada DHC-6 Twin Otter 300
registration: 9N-ABB
accident date: 16-02-2014
type: de Havilland Canada DHC-6 Twin Otter 300
registration: 9N-ABB
| Statuts: | Accident investigation report completed and information captured |
| Date: | dimanche 16 février 2014 |
| Heure: | 13:30 |
| Type/Sous-type: |  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 / Ã bord: 3 |
| Passagers: | victimes: 15 / Ã bord: 15 |
| Total: | victimes: 18 / Ã 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 |
| Jumla Airport (JUM/VNJL), Népal | |
| Numéro de vol: | 183 |
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:

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|
Sources:
» ekantipur.com» Nepali Times
» Hemant Arjyal
» SKYbraryÂ
Opérations de secours
Nepal AAIC issued 11 Safety Recommendations
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Photos
accident date: 16-02-2014
type: de Havilland Canada DHC-6 Twin Otter 300
registration: 9N-ABB
accident date: 16-02-2014
type: de Havilland Canada DHC-6 Twin Otter 300
registration: 9N-ABB
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.
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.
languages: 
Népal
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DHC-6 Twin Otter
- 930+ built
- 272ème loss
- 176ème accident fatal
- le accident 19ème le plus grave (à ce moment là )
- le accident 20ème le plus grave (en ce moment)
Népal- le accident 12ème le plus grave (à ce moment là )
- le accident 14ème le plus grave (en ce moment)
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