ASN Wikibase Occurrence # 360381
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| Date: | Wednesday 1 June 1994 |
| Time: | 06:40 LT |
| Type: |  Piper PA-28R-201T |
| Owner/operator: | Rainbow Air |
| Registration: | N36025 |
| MSN: | 28R-7803308 |
| Total airframe hrs: | 4362 hours |
| Engine model: | CONTINENTAL TSIO-360-FB1 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Trinity Center, CA -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Medford, OR (KMFR) |
| Long Beach, CA (KLGB) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot said that he heard a grinding noise in the engine followed by a prop overspeed. Then the engine suddenly lost all power. ARTCC provided radar vectors to nearest airport and the pilot set up for a dead stick approach; however, he was unable to make the runway. The aircraft touched down gear up in a ditch, bounced out and onto parking lot, then crashed into a parked aircraft. Disassembly of the engine revealed fretting on the parting surfaces of the number 1 main bearing saddle. The crankshaft was found fatigue fractured across the number 1 crankpin at the interface with the number 2 long cheek. One rod end cap nut was found without a cotter pin installed. The second rod end cap nut was found with a shorter than normal cotter pin installed. The number 1 connecting rod bearing was found partially swaged out of the rod, with fretting observed on the bearing surfaces. The side faces of connecting rod number 1 were scored. The engine records revealed that cylinders number 1 and 4 were replaced on May 9, 1994, 29 hours prior to the accident.
Probable Cause: the fatigue fracture of the crankshaft due to improper maintenance installation of the number 1 cylinder and the inadequate torquing of the case through bolts at that location.
Accident investigation:
 |
|
Sources:
NTSB LAX94LA233
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 16-Mar-2024 06:43 | ASN Update Bot | Added |
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