ASN Wikibase Occurrence # 359526
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| Date: | Tuesday 29 November 1994 |
| Time: | 13:30 LT |
| Type: |  Piper PA-28R-201T |
| Owner/operator: | Private |
| Registration: | N1194H |
| MSN: | 28R-7703016 |
| Total airframe hrs: | 1670 hours |
| Engine model: | CONTINENTAL TSIO-360-F |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | La Porte City, IA -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | St. Paul, MN (KSTP) |
| Walnut Ridge, AR (ARG | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
WHILE EN ROUTE THE PILOT HEARD A LOUD POP FOLLOWED BY ENGINE VIBRATIONS AND A PARTIAL LOSS OF ENGINE POWER. THE PILOT DECLARED AN EMERGENCY AND WAS VECTORED TOWARD A GRASS AIRSTRIP WHICH HE COULD NOT LOCATE. EN ROUTE TO THE GRASS STRIP A TOTAL LOSS OF ENGINE POWER WAS EXPERIENCED. THE AIRPLANE WAS LANDED IN A PLOWED CORN FIELD. POST ACCIDENT INSPECTION REVEALED THE CRANKSHAFT HAD SEPARATED BETWEEN THE NO. 3 MAIN BEARING JOURNAL AND THE NO. 5 CYLINDER CRANKPIN DUE TO FATIGUE CRACKING. TCM SERVICE BULLETIN 92-16 ADDRESSING CRANKSHAFTS MADE FROM NON-VACUUM ARC REMELTED STEEL HAD NOT BEEN COMPLIED WITH.
Probable Cause: a material defect which resulted in the fatigue failure of the crankshaft and the aircraft owner's failure to comply with a Mandatory Service Bulletin addressing the defect. A factor related to the accident was the rough terrain on which the forced landing was made.
Accident investigation:
 |
|
Sources:
NTSB CHI95LA048
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 15-Mar-2024 11:53 | ASN Update Bot | Added |
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