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ASN Wikibase Occurrence # 224671
Last updated: 27 September 2020
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information. If you feel this information is incomplete or incorrect, you can submit corrected information.

Time:12:17 LT
Type:Glaser-Dirks DG-505 Elan Orion
Registration: JA505G
C/n / msn: 5E174X26
Fatalities:Fatalities: 0 / Occupants: 2
Other fatalities:0
Aircraft damage: Substantial
Location:500 m south of Mt. Yake, Matsumoto city, Nagano prefecture -   Japan
Phase: En route
Departure airport:Hida Air Park, Takayama city, Gifu prefecture
Destination airport:
Investigating agency: JTSB
A glider made a force landing at 500 meters south from the peak of Mt. Yake, Nagano prefecture. The glider took off from Hida Air Park at 11:44 LT. At 13:15, the pilot onboard reported to the glider club in Tokyo by a cell phone that the glider made a force landing. He was not sure the landing site, but suggested that it may be west of Mt. Yake. Both occupants receive no injuries. After that call, no contact with occupants could not establish. Search and rescue on the first day was unsuccessful. The accident site was located 06:20 LT next morning by a helicopter of Japan Air Self-Defense Force, and both occupants were picked up. The aft fuselage was broken and the right wing was missing. JTSB launched an investigation as an aircraft accident. The pilot reported down draft before the crash.

This accident occurred while flying ridge soaring, the Glider wandered into the downdraft zone on the lee side of the ridge and lost altitude. As the captain tried to make a forced landing to the forest, it is highly probable that the Glider collided with trees, causing damage.
Concerning the reason why the Glider wandered into the downdraft zone on the lee side of the ridge, it is highly probable that he lost his position because the captain did not have sufficient knowledge on the landscape as he had never flown and additionally he was flying without confirming the heading and position with instruments.


Accident investigation:
Investigating agency: JTSB
Status: Investigation completed
Duration: 1 year and 4 months
Download report: Final report

Revision history:

03-May-2019 09:49 isamuel Added
03-May-2019 19:05 isamuel Updated [Location, Source, Damage, Narrative]
08-May-2019 14:29 isamuel Updated [Aircraft type, Registration, Cn, Source, Narrative]
27-Sep-2020 12:41 harro Updated [Time, Narrative, Category, Accident report]
27-Sep-2020 12:41 harro Updated [Aircraft type, Accident report]
27-Sep-2020 12:43 harro Updated [Narrative, Accident report]
27-Sep-2020 12:45 harro Updated [Time, Source, Accident report]
27-Sep-2020 12:48 harro Updated [Accident report]
27-Sep-2020 12:49 harro Updated [Source, Accident report]
27-Sep-2020 12:55 harro Updated [Source, Accident report]

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