ASN Wikibase Occurrence # 364579
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information.
If you feel this information is incomplete or incorrect, you can submit corrected information.
| Date: | Tuesday 3 September 1991 |
| Time: | 19:15 LT |
| Type: |  Piper PA-28R-200 |
| Owner/operator: | Private |
| Registration: | N2080T |
| MSN: | 28R-7135024 |
| Year of manufacture: | 1970 |
| Total airframe hrs: | 3646 hours |
| Engine model: | LYCOMING IO-360-CIC |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Redwood City, CA -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | San Carlos, CA (KSQL) |
| Salinas, CA (KSNS) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE 400 HOUR SINCE FACTORY REMANUFACTURED ENGINE BEGAN TO RUN ROUGH, THEN IT QUIT WITH A LOUD 'BANG.' THE PILOT WAS ATTEMPTING TO COMPLETE A FORCED LANDING IN A PASTURE AREA WHEN THE AIRCRAFT COLLIDED WITH THE GROUND. DISASSEMBLY OF THE ENGINE REVEALED THAT THE NUMBER TWO CYLINDER CONNECTING ROD AND ITS ASSOCIATED ROD CAP HAD FAILED. METALLURGICAL EXAMINATION OF ALL CONNECTING RODS AND CAPS WAS PERFORMED. THE #2 ROD AND CAP FAILED DUE TO A FATIGUE FRACTURE WITH AN ORIGIN ON THE BORE SURFACE. AREAS OF GALLING WERE FOUND ON BOTH THE ROD CAP AND THE CONNECTING ROD BORE. CRACKS WERE IDENTIFIED WITHIN THE GALLED AREA ON THE NUMBER TWO CONNECTING ROD BORE. EXAMINATION OF THE THREE REMAINING CONNECTING RODS AND THEIR CAPS REVEALED GALLED AREAS WITHIN THE BORES. THE METALLURGISTS STATED THAT HE HAD OBSERVED SIMILAR FAILURES ON HELICOPTER PISTON ENGINES WHICH WERE KNOWN TO HAVE HAD AN OVERSPEED.
Probable Cause: THE FATIGUE FAILURE OF THE NUMBER TWO CONNECTING ROD AND ROD CAP DUE TO AN ENGINE OVERSPEED CONDITION WHICH THE RODS AND ROD CAPS WERE EXPOSED AT SOME UNDETERMINED HISTORICAL POINT.
Accident investigation:
 |
|
Sources:
NTSB LAX91LA382
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 19-Mar-2024 16:38 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
The Aviation Safety Network is an exclusive service provided by:
Quick Links:
| ASN Home | Send Correction / Feedback |
| FSF Home | Disclaimer | Copyright |
| Contact Us | Privacy Policy |
| Press / Media |
CONNECT WITH US:
©2024 Flight Safety Foundation