ASN Wikibase Occurrence # 386103
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| Date: | Friday 23 March 2001 |
| Time: | 19:45 LT |
| Type: |  Cessna 172RG |
| Owner/operator: | Private |
| Registration: | N4823V |
| MSN: | 172RG0391 |
| Year of manufacture: | 1980 |
| Total airframe hrs: | 4900 hours |
| Engine model: | Lycoming O-360-F1A6 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Waco, TX -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Fort Worth Meacham International Airport,TX (FTW/KFTW) |
| Georgetown Municipal Airport, TX (KGTU) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
While in cruise flight, the engine "began to vibrate excessively and would not produce enough power to maintain altitude." Approximately 5 miles from an alternate airport, the engine "quit completely and locked up," and the pilot initiated a forced landing to a field. The airplane touched down in the field, struck a fence and a ditch, nosed over, and came to rest inverted. Examination of the engine revealed that the number four exhaust valve separated from its stem and was found "wedged" in the spark plug hole. The number four exhaust valve push-rod and push-rod tube were bent aft at the cam follower end. According to the engine maintenance records, the engine was field overhauled on June 22, 1999, and had accumulated approximately 450 flight hours since overhaul at the time of the accident.
Probable Cause: the failure of the number four cylinder exhaust valve which resulted in a total loss of engine power during cruise. A contributing factor was the lack of suitable terrain for the forced landing.
Accident investigation:
 |
|
Sources:
NTSB FTW01LA085
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 05-Apr-2024 11:13 | ASN Update Bot | Added |
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