ASN Wikibase Occurrence # 228377
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| Date: | Tuesday 20 August 2019 |
| Time: | 09:15 |
| Type: |  Grumman G-164B Ag-Cat |
| Owner/operator: | Werth Aerial Spraying Inc |
| Registration: | N3631Z |
| MSN: | 765B |
| Year of manufacture: | 1985 |
| Total airframe hrs: | 2616 hours |
| Engine model: | Pratt & Whitney R-985-AN-14B |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | south of Hays, Ellis County, KS -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Agricultural |
| Departure airport: | Hays, KS |
| Hays, KS | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot was performing an agricultural application flight, and the airplane was observed departing a private airstrip to the east toward a field west of the airstrip. The airplane impacted terrain in a steep, nose-down attitude. A postimpact fire ensued. There were no witnesses to the accident.
Impact signatures and twisting of the wreckage were indicative of a nose-low spin, consistent with an aerodynamic stall . Flight control continuity could not be verified due to fire damage, but no anomalies were noted with the airframe and engine that would have precluded normal operation. The pilot's toxicology tests results showed no drug or alcohol use. Thus, it is likely that aerodynamic stall resulted from the pilot allowing the airplane to exceed its critical angle of attack during a turn.
Probable Cause: The pilot's exceedance of the airplane's critical angle of attack, which resulted in an aerodynamic stall.
Accident investigation:
 |
|
Sources:
NTSB
FAA register: https://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=3631Z
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 20-Aug-2019 17:15 | Geno | Added |
| 20-Aug-2019 18:23 | harro | Updated [Aircraft type] |
| 20-Aug-2019 20:48 | RobertMB | Updated [Time, Aircraft type, Registration, Cn, Operator, Location, Phase, Nature, Departure airport, Source, Damage, Narrative] |
| 20-Aug-2019 20:49 | RobertMB | Updated [Narrative] |
| 20-Aug-2019 21:09 | Captain Adam | Updated [Aircraft type, Narrative] |
| 20-Aug-2019 21:21 | RobertMB | Updated [Aircraft type, Departure airport, Destination airport, Narrative] |
| 21-Aug-2019 08:04 | harro | Updated [Aircraft type] |
| 21-Aug-2019 14:22 | RobertMB | Updated [Time, Aircraft type, Source, Narrative] |
| 22-May-2020 09:25 | ASN Update Bot | Updated [Time, Departure airport, Destination airport, Source, Narrative, Accident report, ] |
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