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Accident description
Last updated: 25 May 2016
Date:Saturday 3 July 1971
Time:09:05 GMT
Type:NAMC YS-11A-217
Operator:TOA Domestic Airlines
Registration: JA8764
C/n / msn: 2134
First flight: 1970
Crew:Fatalities: 4 / Occupants: 4
Passengers:Fatalities: 64 / Occupants: 64
Total:Fatalities: 68 / Occupants: 68
Airplane damage: Destroyed
Airplane fate: Written off (damaged beyond repair)
Location:Yokotsu Mt (   Japan)
Phase: En route (ENR)
Nature:Domestic Scheduled Passenger
Departure airport:Sapporo-Chitose Airport (CTS/RJCC), Japan
Destination airport:Hakodate Airport (HKD/RJCH), Japan
Flightnumber: 63
A NAMC YS-11A passenger plane, JA8764, was destroyed in an accident on Yokotsudake Mountain, Japan. All 64 passengers and 4 crew members were killed.
TOA Domestic flight 63 originated in Sapporo-Chitose Airport (CTS) and was approaching Hakodate Airport (HKD) at the time of the crash.
The flight crew mistook a point approximately 5 nautical miles north of the Hakodate NDB as being just over the Hakodate NDB, a navigation aid, and initiated their descent from an estimated altitude of 6,000 ft in an attempt to cross the high station at 2,500 ft by making a single circle. The outbound flight leg was extended westward and because of a strong southwesterly wind, the aircraft drifted further to the north than the crew expected, striking the mountain.

Controlled Flight Into Terrain (CFIT) - Mountain

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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 Sapporo-Chitose Airport to Hakodate Airport as the crow flies is 132 km (82 miles).

This information is not presented as the Flight Safety Foundation or the Aviation Safety Networkĺs 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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