ASN Wikibase Occurrence # 352817
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| Date: | Saturday 14 August 1999 |
| Time: | 08:10 LT |
| Type: |  Aeronca 11AC |
| Owner/operator: | Private |
| Registration: | N3184E |
| MSN: | 11AC-1529 |
| Total airframe hrs: | 2581 hours |
| Engine model: | Continental A-75-8 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Rockwall, TX -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Private |
| Departure airport: | (F46) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
While maneuvering in the traffic pattern, the airplane experienced a total loss of engine power. The private pilot elected to land in a field that contained 5-foot tall maize crops. Examination of the Continental A-75-8 engine revealed that the crankshaft was separated aft of the #3 connecting rod journal. Examination of the crankshaft fracture revealed that a fatigue crack had developed in a secondary radius between the journal and the cheek. The secondary radius contained machining marks. The engine's maintenance records revealed that during the last major overhaul, the crankshaft had been ground .010 inches.
Probable Cause: The mechanic's improper machining of the crankshaft during a major overhaul, which resulted in a fatigue crack and subsequent failure of the crankshaft. A factor was the lack of suitable terrain for the forced landing.
Accident investigation:
 |
|
Sources:
NTSB FTW99LA227
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 08-Mar-2024 20:20 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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