ASN Wikibase Occurrence # 232423
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| Date: | Friday 24 January 2020 |
| Time: | 09:56 |
| Type: |  Stinson V-77 Reliant |
| Owner/operator: | Private |
| Registration: | N50249 |
| MSN: | 77-458 |
| Engine model: | Pratt & Whitney 985 |
| Fatalities: | Fatalities: 2 / Occupants: 3 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | near Auburn Municipal Airport (AUN/KAUN), Auburn, CA -
 United States of America
|
| Phase: | Take off |
| Nature: | Private |
| Departure airport: | Auburn Municipal Airport, CA (AUN/KAUN) |
| Auburn Municipal Airport, CA (AUN/KAUN) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
On January 24, 2020, about 1000 Pacific standard time, a Stinson Vultee V-77 airplane, N50249, was destroyed when it collided with terrain about 3/4-mile northeast of Auburn Municipal Airport (AUN), Auburn, California. The commercial pilot and pilot-rated passenger were fatally injured, and the private pilot was seriously injured. The airplane was registered to and operated by the pilot under the provisions of Title 14 Code of Federal Regulations Part 91 as a personal flight. Visual meteorological conditions prevailed, and no flight plan was filed for the local flight. The airplane departed AUN about 0945.
The pilot departed on a local flight with two passengers. Several witnesses reported that they heard the airplane’s engine backfiring and sputtering and subsequently heard the engine quit. The surviving passenger, who was seated in the front right seat, stated that the engine lost power and there was nowhere to land. The airplane subsequently impacted heavily wooded terrain about 1 mile from the departure airport.
Postaccident examination of the engine revealed that the No. 7 cylinder intake valve was stuck open. The No. 2 cylinder front spark plug was defective, and the Nos. 2- and 4-cylinders’ ignition wires were frayed, worn, and displayed arcing, which likely led to erratic operation or a lack of ignition in these two cylinders. The culmination of these issues most likely led to the engine running rough, backfiring, and subsequently losing total power.
An annual inspection was accomplished on the airframe and engine about 2 months before the accident. General maintenance practices and the inspection should have identified the anomalies that were found during the postaccident engine examination.
Probable Cause: A total loss of engine power due to a combination of mechanical engine anomalies. Contributing to the accident was inadequate maintenance that failed to identify the engine anomalies.
Accident investigation:
 |
|
Sources:
https://www.kolotv.com/content/news/Placer-County-Deputies-respond-to-plane-crash-at-golf-course-in-Auburn-567267871.html ex.43-44171, R Navy/FB730.
https://www.kcra.com/article/multiple-people-hurt-plane-crash-near-auburn-airport/30656099
https://www.turnto23.com/media/v/content/ec300abec7cf9f1f39e71367d6c90bc5
https://www.theunion.com/news/two-die-in-auburn-plane-crash-rancho-cordova-reserve-police-officer-among-dead-video/
NTSB
https://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=50249
https://en.wikipedia.org/wiki/Stinson_Reliant
https://www.airliners.net/photo/Untitled/Stinson-AT-19-Reliant-V-77/1988356 (photo)
Location
Images:
Photos: NTSB
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Jan-2020 22:39 | Geno | Added |
| 24-Jan-2020 22:45 | Geno | Updated [Phase, Departure airport, Source, Narrative] |
| 24-Jan-2020 23:22 | Iceman 29 | Updated [Time, Source, Embed code, Damage] |
| 25-Jan-2020 01:52 | Geno | Updated [Location, Destination airport, Source, Embed code] |
| 25-Jan-2020 08:05 | harro | Updated [Aircraft type] |
| 25-Jan-2020 11:56 | Iceman 29 | Updated [Nature, Source, Embed code] |
| 25-Jan-2020 12:04 | Iceman 29 | Updated [Source, Embed code, Narrative] |
| 25-Jan-2020 17:50 | A.J.Scholten | Updated [Source, Embed code] |
| 25-Jan-2020 19:54 | RobertMB | Updated [Aircraft type, Narrative] |
| 29-Jan-2020 07:47 | harro | Updated [Aircraft type] |
| 13-Jun-2021 18:40 | aaronwk | Updated [Time, Destination airport, Source, Narrative] |
| 20-May-2022 21:25 | Captain Adam | Updated [Time, Location, Destination airport, Source, Embed code, Narrative, Accident report, Photo] |
| 20-May-2022 21:28 | Captain Adam | Updated [Photo] |
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