ASN Wikibase Occurrence # 353030
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| Date: | Monday 12 July 1999 |
| Time: | 12:25 LT |
| Type: |  Cessna 172H |
| Owner/operator: | Private |
| Registration: | N3213L |
| MSN: | 17256113 |
| Total airframe hrs: | 3201 hours |
| Engine model: | Continental O-300 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Falmouth, KY -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Private |
| Departure airport: | Huntington, WV (HTS |
| Mount Vernon, IL | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
On the day of the accident, maintenance was preformed on the number one cylinder to dislodge a stuck valve. The pilot then refueled the airplane and taxied for departure. Once airborne, the pilot climbed to a cruise altitude of 3,500 feet msl without difficulty. Approximately 45 minutes into the flight, the engine started running rough. The pilot diverted, but before he could complete a successful precautionary landing, there was a total loss of engine power. The airplane crashed into trees. Prior to the engine running 'rough', EGT was indicating 'normal.' After the engine started running 'rough', the EGT dropped to below 'normal.' The EGT sensor was located on the number one cylinder. No anomalies with the engine were found after the accident except for a broken intake valve rocker-arm on the number one cylinder. Examination of the rocker-arm revealed no evidence of fatigue or any other form of progressive crack growth.
Probable Cause: A stuck intake-valve on the number one cylinder which resulted in a loss of engine power.
Accident investigation:
 |
|
Sources:
NTSB NYC99LA173
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 09-Mar-2024 09:34 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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