ASN Wikibase Occurrence # 44422
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| Date: | Tuesday 19 July 2005 |
| Time: | 12:50 |
| Type: | Aviastroitel AC-4 Russia |
| Owner/operator: | Private |
| Registration: | N9276Y |
| MSN: | 13 |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Sparks, NV -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Private |
| Departure airport: | Sparks, NV, NV (NV23) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The glider stalled and impacted level terrain on final approach to landing. The pilot returned to the gliderport about 20 minutes after release from the tow plane. The pilot made no radio transmissions to indicate the reason for the return to the gliderport. Airborne and ground witnesses reported that they saw the accident glider enter the downwind leg at a high altitude. After turning onto the final approach leg, the glider began to make S-turns to lose altitude. Witnesses indicated that on the third S-turn, about 200 feet above the ground, the glider stalled and descended in a near vertical nose down attitude and impacted the ground short of the runway. No evidence of a preimpact mechanical malfunction or failure was found during post accident examination of the glider. Chlorpheniramine, an over-the-counter sedative antihistamine, was detected on toxicology testing of the pilot's blood at a level several times higher than that expected with the dosage described in the pilot's most recent application for airman medical certificate.
Probable Cause: the pilot's failure to maintain an adequate airspeed while performing S-turns on final approach, which resulted in a stall and uncontrolled descent into terrain. A contributing factor in the accident was the pilot's impairment due to ingestion of an over-the-counter sedating antihistamine.
Accident investigation:
 |
|
Sources:
NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20050811X01227&key=1
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 28-Oct-2008 00:45 | ASN archive | Added |
| 22-Aug-2016 16:03 | Alpine Flight | Updated [Time, Aircraft type, Cn, Operator, Departure airport, Destination airport, Narrative] |
| 21-Dec-2016 19:24 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 06-Dec-2017 10:44 | ASN Update Bot | Updated [Cn, Departure airport, Destination airport, Source, Narrative] |
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