ASN Wikibase Occurrence # 199523
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| Date: | Saturday 8 October 2016 |
| Time: | 18:40 |
| Type: |  Cessna 150M |
| Owner/operator: | Private |
| Registration: | N704LE |
| MSN: | 15078689 |
| Year of manufacture: | 1976 |
| Total airframe hrs: | 7652 hours |
| Engine model: | Continental O-200-A |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Beasley, TX -
 United States of America
|
| Phase: | En route |
| Nature: | Training |
| Departure airport: | Wharton, TX (ARM) |
| Sugar Land, TX (SGR) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The student pilot reported that he was returning from a solo flight when the engine "started failing." The engine speed decreased to about 1,500 rpm with a "significant" vibration. The pilot's efforts to restore engine power were unsuccessful, and the engine ultimately lost total power. He subsequently conducted a forced landing to a plowed field, during which the airplane nosed over.
A postaccident examination of the engine revealed that the No. 2 cylinder exhaust valve was stuck in the “full open” position. Disassembly of the cylinder revealed that the exhaust valve stem exhibited carbon deposits consistent with the stuck valve condition. No other engine anomalies were noted.
Probable Cause: The No. 2 cylinder exhaust valve being stuck in the “full open” position due to carbon deposits, which resulted in a total loss of engine power.
Accident investigation:
 |
|
Sources:
NTSB
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 08-Sep-2017 19:48 | ASN Update Bot | Added |
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