ASN Wikibase Occurrence # 167338
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| Date: | Sunday 22 June 2014 |
| Time: | 14:30 |
| Type: | ASC Spirit |
| Owner/operator: | Private |
| Registration: | N127JK |
| MSN: | 0004 |
| Year of manufacture: | 2007 |
| Total airframe hrs: | 285 hours |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Cedar Valley Airport (UT10), Cedar Fort, UT -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Private |
| Departure airport: | Lehi, UT (UT10) |
| Lehi, UT (UT10) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The private pilot of the experimental, amateur-built glider was conducting a local flight. The tow plane pilot reported that, as the glider pilot approached the privately owned airport, he announced over the radio his intent to land. He and one witness in the area reported seeing the glider circling to land and making several steep turns during the descent. When the glider was about 30 to 40 ft above ground level, the nose suddenly dropped, and the glider then descended straight down into the ground short of the runway. Another witness reported that it looked like the glider had stalled.
Wreckage documentation indicated that the glider impacted terrain in a steep, nose-down, left-wing-low attitude with little forward motion, which is consistent with a stall. Postaccident examination of the airframe revealed no anomalies that would have precluded normal operation. It is likely that the pilot exceeded the glider’s critical angle of attack while maneuvering to land, which resulted in an aerodynamic stall.
Probable Cause: The pilot’s exceedance of the glider’s critical angle of attack while maneuvering in a steep turn at low altitude, which resulted in an aerodynamic stall.
Accident investigation:
 |
|
Sources:
NTSB
FAA register: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=127JK
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 23-Jun-2014 21:20 | Geno | Added |
| 28-Jun-2014 07:12 | SJorgensen | Updated [Narrative] |
| 05-Jul-2014 02:42 | Geno | Updated [Time, Source] |
| 21-Dec-2016 19:28 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 05-Nov-2017 08:48 | ASN Update Bot | Updated [Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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