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Last updated: 26 September 2021
Statuts:Enquête Officielle
Date:samedi 28 octobre 1989
Heure:18:37 HST
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:Aloha IslandAir
Immatriculation: N707PV
Numéro de série: 400
Année de Fabrication: 1973
Heures de vol:19875
Cycles:30139
Moteurs: 2 Pratt & Whitney Canada PT6A-27
Equipage:victimes: 2 / à bord: 2
Passagers:victimes: 18 / à bord: 18
Total:victimes: 20 / à bord: 20
Dégats de l'appareil: Détruit
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:près de Hoolehua-Molokai Airport, HI (MKK) (   Etats-Unis d'Amérique)
Élévation des lieux de l'accident: 183 m (600 feet) amsl
Phase de vol: En approche (APR)
Nature:Transport de Passagers Nat.
Aéroport de départ:Kahului Airport, HI (OGG/PHOG), Etats-Unis d'Amérique
Aéroport de destination:Molokai/Kaunakakai Airport, HI (MKK/PHMK), Etats-Unis d'Amérique
Numéro de vol:1712
Détails:
Aloha IslandAir Flight 1712 departed Kahului at 18:25 for a 25-minute VFR flight to Kaunakakai. The aircraft climbed to 1000 feet and descended to 500 feet at 18:30. The plane struck a 27deg rocky slope on the north-eastern slopes of the coastal mountains on the island of Molokai at around 600 feet.

Probable Cause:

PROBABLE CAUSE: "The decision of the captain to continue flight under visual flight rules at night into instrument meteorological conditions (IMC), which obscured rising mountainous terrain. Contributing to the accident was the inadequate supervision of personnel, training, and operations by Aloha IslandAir management. Also contributing to the accident was the insufficient oversight during a period of rapid operational expansion and corporate growth."
Board member Jim Burnett filed the following dissenting statement on the Probable Cause: "I would add to the statement of probable cause the following additional language: Also contributing to the accident was the failure of the Federal Aviation Administration to require a Ground Proximity Warning System for Part 135 aircraft."

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 11 months
Accident number: NTSB/AAR-90-05
Download report: Final report

Sources:
» NTSB/AAR-90/05


Opérations de secours

NTSB issued 11 Safety Recommendations

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Photos

photo of DHC-6-Twin-Otter-300-N707PV
 

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 Kahului Airport, HI et Molokai/Kaunakakai Airport, HI est de 74 km (46 miles).
Accident location: Approximate; accuracy within a few kilometers.

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
  • 146ème loss
  • 97ème accident fatal
  • le accident 6ème le plus grave (à ce moment là)
  • le accident 11ème le plus grave (en ce moment)
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