Accident de Havilland Canada DHC-6 Twin Otter 200 N563MA,
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Date:Tuesday 6 September 1977
Type:Silhouette image of generic DHC6 model; specific model in this crash may look slightly different    
de Havilland Canada DHC-6 Twin Otter 200
Owner/operator:Alaska Aeronautical Industries
Registration: N563MA
MSN: 196
Year of manufacture:1969
Total airframe hrs:15369 hours
Engine model:Pratt & Whitney Canada PT6A-20
Fatalities:Fatalities: 13 / Occupants: 13
Aircraft damage: Destroyed, written off
Location:Mt Iliamna, AK -   United States of America
Phase: Take off
Nature:Passenger - Scheduled
Departure airport:Iliamna Airport, AK (ILI/PAIL)
Destination airport:Anchorage International Airport, AK (ANC/PANC)
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
The Twin Otter struck the southwest side of Mount Iliamna, approx. 7000 feet MSL in IMC conditions.

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
Report number: DCA77AA026
Status: Investigation completed
Duration: 8 months
Download report: Final report





photo (c) NTSB; Mt Iliamna, AK; 06 September 1977; (publicdomain)

Revision history:


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