ASN Wikibase Occurrence # 295636
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| Date: | Thursday 26 June 2003 |
| Time: | 13:30 LT |
| Type: |  Cessna 150F |
| Owner/operator: | Williamson Flying Club Inc. |
| Registration: | N8517G |
| MSN: | 15062617 |
| Year of manufacture: | 1966 |
| Total airframe hrs: | 2003 hours |
| Engine model: | Continental O-200 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Williamson, New York -
 United States of America
|
| Phase: | Unknown |
| Nature: | Training |
| Departure airport: | Williamson (3G7) |
| (3G7) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
As the airplane was climbing, with the student pilot at the controls, the engine began to run rough. The certified flight instructor (CFI) took over the controls and elected to perform a forced landing to an apple orchard. During the forced landing, the left and right wings struck trees. The airplane came to rest upright. Examination of the engine revealed a fractured cylinder rocker shaft boss to the number one cylinder. The fracture was consistent with fatigue. An Airworthiness Directive, published in 1994, was issued to prevent possible engine power loss and subsequent engine failure. The AD required that maintenance personnel inspect the cylinder rocker shaft bosses for cracks at the next cylinder removal from the engine or engine overhaul, whichever occurs first, after the effective date of the AD. A revised AD became effective in 1996. Review of the airplane's engine maintenance records indicated that the last engine overhaul and cylinder removal was accomplished in 1977.
Probable Cause: The failure of a rocker arm shaft boss, which resulted in a partial loss of power and subsequent forced landing. A factor was the unsuitable terrain.
Accident investigation:
 |
|
Sources:
NTSB NYC03LA137
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 13-Oct-2022 10:54 | ASN Update Bot | Added |
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