Stemme Gmbh & Co S10-VT accident near Mackay, ID
On August 19, 2009, a Stemme Gmbh & Co S10-VT (glider) was involved in an accident near Mackay, ID. 1 person died. Damage to the aircraft: substantial.
- Date
- August 19, 2009
- Place
- Mackay, ID
- Aircraft
- Stemme Gmbh & Co S10-VT · Glider
- Injuries
- 1 fatal, 0 serious, 0 minor
- Damage
- Substantial
- Position
- 43.874°N, 113.755°W
- NTSB ID
- 20090821X55303
Official records · WPR09FA409
- Public docket: reports, statements and exhibits from the investigation
NTSB summary
**This report was modified on 5/3/2010** HISTORY OF FLIGHT On August 19, 2009, at 1702 mountain daylight time, a Stemme GMBH & CO S10-VT, N35MP, collided with mountainous terrain near Mackay, Idaho. The pilot was operating the glider under the provisions of 14 Code of Federal Regulations (CFR) Part 91. The certificated commercial pilot, who held private pilot privileges in gliders, was killed, and the motor glider was substantially damaged by impact forces. The local personal flight departed Arco-Butte County Airport, Arco, Idaho, about 1525. Visual meteorological conditions prevailed, and no flight plan had been filed. The pilot departed Arco with two other gliders, with the intention of soaring in the area. The group planned to return to Arco by 1800. The two other pilots in the group reported that they were in radio contact with the accident pilot until about 1630, at which time he reported that he was close to the Mackay Reservoir, and was having difficulty gaining sufficient lift to climb out of the area. The pilots attempted to establish radio communications about 45 minutes later, but were unable to contact him. They stated that this was not unusual, and they were not concerned due to the limited range of their radio transceivers. The remaining members of the group decided to return to Arco about 1715 due to a lack of sufficient lift in the area. One pilot reported that soaring conditions were, "mediocre," the weather was "docile." He additionally stated that they had been warned by other pilots of the possibility of turbulence in the area. The accident pilot did not
Probable cause
The pilot's failure to maintain adequate airspeed while maneuvering in terrain-induced turbulent wind conditions, resulting in an inadvertent entry into a stall/spin.
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Browse: Idaho
Source: NTSB aviation accident database (US government, public domain). Findings may be preliminary or later revised by the NTSB. Not a complete global record.
