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Accident
Last updated: 17 October 2017
Statuts:Enquête Officielle
Date:lundi 2 décembre 1968
Heure:09:36
Type/Sous-type:Silhouette image of generic F27 model; specific model in this crash may look slightly different
Fairchild F-27B
Compagnie:Wien Consolidated Airlines
Immatriculation: N4905
Numéro de série: 49
Année de Fabrication: 1959
Heures de vol:17194
Moteurs: 2 Rolls-Royce Dart 514-7E
Equipage:victimes: 3 / à bord: 3
Passagers:victimes: 36 / à bord: 36
Total:victimes: 39 / à bord: 39
Dégats de l'appareil: Détruit
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:42 km (26.3 milles) E of Iliamna Airport, AK (ILI) (   Etats-Unis d'Amérique)
Élévation des lieux de l'accident: 67 m (220 feet) amsl
Phase de vol: En approche (APR)
Nature:Transport de Passagers Nat.
Aéroport de départ:Anchorage International Airport, AK (ANC/PANC), Etats-Unis d'Amérique
Aéroport de destination:Iliamna Airport, AK (ILI/PAIL), Etats-Unis d'Amérique
Numéro de vol: 55
Détails:
A Wien Consolidated Airlines Fairchild F-27B, N4905, crashed at Pedro Bay, Alaska. The 36 passengers and three crewmembers were killed in the accident and the aircraft was destroyed by in-flight breakup and ground impact.
The aircraft was being operated as Flight 55 in scheduled domestic passenger service between Anchorage International Airport, AK (ANC) and Dillingham Municipal Airport, AK (DLG) with en route stops at Iliamna Airport, AK (ILI), Big Mountain Airport, AK (BMX), and King Salmon Airport, AK (AKN).
Flight 55 departed from Anchorage at 08:46 on an instrument flight plan for Iliamna. The flight was cleared to cruise at 16,000 feet. The weather at Iliamna was reported to be clear, and the visibility was 15 miles at the time of the flight's departure from Anchorage.
The flight proceeded toward Iliamna without reported difficulty, and at 09:25, the first officer requested a clearance for an approach to Iliamna. This request was approved. No further communication was received from the crew.
Ground witnesses in and around the Pedro Bay area reported that they saw a fireball and a large cloud of black smoke which appeared to be behind the wing of the aircraft. The aircraft appeared to continue on course for a short period of time, then pieces of the aircraft were seen falling, and the aircraft entered a spinning descent.
The major portion of the wreckage was located on the southern shore of Foxies Lake at an elevation of approximately 220 feet.

Probable Cause:

PROBABLE CAUSE: "The Board determines that the probable cause of this accident was an in-flight structural failure caused by an encounter with severe to extreme turbulence. This turbulence was not forecast and its presence was not known to the flightcrew. The failure occurred in an area of the right wing (WS 197) which had been weakened to an indeterminate degree by pre-existing fatigue cracks."

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 1 year and 8 months
Accident number: NTSB/AAR-70-16
Download report: Final report


Opérations de secours

NTSB issued 1 Safety Recommendation

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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 Anchorage International Airport, AK et Iliamna Airport, AK est de 310 km (194 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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Fairchild F-27

  • 129 built
  • 15ème loss
  • 10ème accident fatal
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 Etats-Unis d'Amérique
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