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Last updated: 17 October 2021
Datum:Dienstag 6 September 1977
Zeit:14:52 ADT
Flugzeugtyp:Silhouette image of generic DHC6 model; specific model in this crash may look slightly different
de Havilland Canada DHC-6 Twin Otter 200
Fluggesellschaft:Alaska Aeronautical Industries
Kennzeichen: N563MA
Werknummer: 196
Baujahr: 1969
Triebwerk: 2 Pratt & Whitney Canada PT6A-20
Besatzung:Todesopfer: 2 / Insassen: 2
Fluggäste:Todesopfer: 11 / Insassen: 11
Gesamt:Todesopfer: 13 / Insassen: 13
Sachschaden: Zerstört
Konsequenzen: Written off (damaged beyond repair)
Unfallort:Mt Iliamna, AK (   USA)
Flugphase: Während des Fluges (ENR)
Betriebsart:Inländischer planmäßiger Passagierflug
Flug von:Iliamna Airport, AK (ILI/PAIL), USA
Flug nach:Anchorage International Airport, AK (ANC/PANC), USA
Flugnummer: 302
The Twin Otter struck the southwest side of Mount Iliamna, approx. 7000 feet MSL in IMC conditions.

Probable Cause:

PROBABLE CAUSE: "The failure of the flight crew to use proper navigational procedures for the route to be flown, especially their failure to use the available back-up means of navigation to verify the position and the progress of the flight."

Accident investigation:
Investigating agency: NTSB
Status: Investigation completed
Duration: 240 days (8 months)
Accident number: NTSB/AAR-78-05
Download report: Final report

» NTSB-AAR-78-5


NTSB issued 5 Safety Recommendations

Show all...


photo of DHC-6-Twin-Otter-200-N563MA

This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Iliamna Airport, AK to Anchorage International Airport, AK as the crow flies is 310 km (194 miles).
Accident location: Approximate; accuracy within a few kilometers.

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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DHC-6 Twin Otter

  • 930+ built
  • 44th loss
  • 30th Fataler Unfall
  • 2nd worst accident (Zu diesem Zeitpunkt)
  • 47th worst accident (Momentan)
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