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| Date: | Tuesday 24 October 1995 |
| Time: | 11:25 LT |
| Type: |  Piper PA-28R-180 |
| Owner/operator: | Airman Flight School, Inc. |
| Registration: | N7471J |
| MSN: | 28R-30824 |
| Year of manufacture: | 1968 |
| Engine model: | Lycoming IO-360-B1A |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Other fatalities: | 0 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Dibble, OK -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Training |
| Departure airport: | Norman, OK (KOUN) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
While practicing maneuvers at 3,500 feet, the pilots heard a loud noise and the windshield became covered with oil. During the ensuing forced landing, the airplane collided with a fence and ditch. Engine disassembly revealed the #4 connecting rod had fractured. The #2 and #4 top connecting rod nuts were loose. Metallurgical examination disclosed the #4 bottom connecting rod bolt had failed in overload and the #4 connecting rod had failed from high stress, low cycle fatigue.
Probable Cause: an overload failure of the #1 connecting rod bolt and resulting connecting rod fatigue failure. A factor was the lack of suitable terrain for the forced landing.
Accident investigation:
 |
|
Sources:
NTSB FTW96LA025
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 14-Mar-2024 09:57 | ASN Update Bot | Added |
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