ASN Wikibase Occurrence # 90498
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| Date: | Thursday 24 February 2011 |
| Time: | 01:45 |
| Type: |  Cessna T210M |
| Owner/operator: | Flight Express Inc. |
| Registration: | N6149B |
| MSN: | 21062694 |
| Total airframe hrs: | 12103 hours |
| Engine model: | Continental IO-550-P8B |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Independence, Missouri -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Cahokia, IL (CPS) |
| Kansas City, MO (MKC) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that he was in cruise flight when the engine began to run rough and lose power. Smoke began to enter the cockpit, and engine oil covered the windshield. The engine ultimately lost all power. The pilot executed a forced landing to a roadway, and the left wing struck a bridge guardrail. Examination of the engine revealed a fatigue failure of the crankshaft initiating at the No. 6 connecting rod journal. Further examination determined that several crankcase main bearing saddles were oversized compared to the required specifications. As a result, the crankshaft was not adequately supported within the crankcase during operation, which precipitated the fatigue failure of the crankshaft. Records indicated that the engine was initially manufactured with one oversized saddle bore. The manufacturer subsequently rebuilt the engine, which was installed on the accident airplane. At the time of the accident, the engine had accumulated 1,303.5 hours since it was rebuilt.
Probable Cause: Latent dimensional discrepancies related to the engine crankcase main bearing saddle bores, which precipitated the fatigue failure of the crankshaft and a complete loss of engine power. Contributing to the accident was the engine manufacturer's failure to properly identify and address the crankcase discrepancies when the engine was rebuilt.
Accident investigation:
 |
|
Sources:
NTSB
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Feb-2011 20:08 | slowkid | Added |
| 24-Feb-2011 20:09 | slowkid | Updated [Operator] |
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 27-Nov-2017 16:42 | ASN Update Bot | Updated [Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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