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Accident
Last updated: 20 October 2017
Status:Definitief
Datum:maandag 2 december 1968
Tijd:09:36
Type:Silhouette image of generic F27 model; specific model in this crash may look slightly different
Fairchild F-27B
Luchtvaartmaatschappij:Wien Consolidated Airlines
Registratie: N4905
Constructienummer: 49
Bouwjaar: 1959
Aantal vlieguren:17194
Motoren: 2 Rolls-Royce Dart 514-7E
Bemanning:slachtoffers: 3 / inzittenden: 3
Passagiers:slachtoffers: 36 / inzittenden: 36
Totaal:slachtoffers: 39 / inzittenden: 39
Schade: Vernield
Gevolgen: Written off (damaged beyond repair)
Plaats:42 km (26.3 mijl) E of Iliamna Airport, AK (ILI) (   Verenigde Staten)
Fase: Nadering (APR)
Soort vlucht:Binnenlandse lijnvlucht
Vliegveld van vertrek:Anchorage International Airport, AK (ANC/PANC), Verenigde Staten
Vliegveld van aankomst:Iliamna Airport, AK (ILI/PAIL), Verenigde Staten
Vluchtnummer: 55
Beschrijving:
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


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NTSB issued 1 Safety Recommendation

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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 Anchorage International Airport, AK en Iliamna Airport, AK bedraagt 310 km (194 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 Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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Fairchild F-27

  • 129 built
  • 15e ongeval
  • 10e dodelijk ongeval
  • 2e zwaarste ongeval (toen het plaatsvond)
  • 3e zwaarste ongeval (op dit moment)
» safety profile

 Verenigde Staten
  • 50e zwaarste ongeval (toen het plaatsvond)
  • 85e zwaarste ongeval (op dit moment)
» safety profile