ASN Wikibase Occurrence # 352463
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| Date: | Saturday 9 October 1999 |
| Time: | 15:00 LT |
| Type: |  Cessna 150G |
| Owner/operator: | Sunshine Aviation |
| Registration: | N3603J |
| MSN: | 15064903 |
| Total airframe hrs: | 3198 hours |
| Engine model: | Continental O-200-A |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | El Reno, OK -
 United States of America
|
| Phase: | En route |
| Nature: | Training |
| Departure airport: | Guthrie, OK (KGOK) |
| Hobart, OK (KHBR) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
A total loss of engine power occurred during a dual cross-county instructional flight. During the ensuing forced landing in soft terrain, the nose landing gear collapsed. Examination of the Continental O-200-A engine, revealed that the intake rocker arm on the #4 cylinder was separated. Metallurgical examination indicated that a fatigue fracture initiated on the push rod side of the rocker arm. There was no evidence of machining defects or mechanical deformation associated with the fatigue crack propagation. The #4 cylinder had accumulated 76 hours of operation since new at the time of the rocker arm failure. No maintenance records were found for any repair, overhaul, or replacement of the rocker arm for the #4 cylinder. Total time on the engine was 3,198 hours.
Probable Cause: The total loss of engine power resulting from a fatigue failure of the intake rocker arm for the #4 cylinder. A factor was the soft terrain encountered during the forced landing.
Accident investigation:
 |
|
Sources:
NTSB FTW00LA009
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 07-Mar-2024 16:42 | ASN Update Bot | Added |
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