ASN Wikibase Occurrence # 293578
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| Date: | Monday 20 June 2005 |
| Time: | 09:30 LT |
| Type: |  Cessna 188A |
| Owner/operator: | |
| Registration: | N2133U |
| MSN: | 18800653 |
| Year of manufacture: | 1970 |
| Engine model: | Continental IO 520 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Fairview, Montana -
 United States of America
|
| Phase: | Unknown |
| Nature: | Agricultural |
| Departure airport: | Fairview, MT (5U6) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
While en route at approximately 100 feet above the ground during an aerial application operation, one of the airplane's two propeller blades separated from the propeller hub. Subsequently, the remaining propeller blade and hub separated from the airplane, culminating with the pilot making a forced landing to an open field. Examination of the propeller assembly revealed that the propeller blade model was the correct blade for the propeller; however, the propeller model was not approved for the Cessna 188A with a TCM IO-520 engine. It was also revealed that the propeller should have been filled with red dyed oil for crack detection. A visual inspection of the aircraft revealed no evidence of red dyed oil on the surface of either propeller blade or the propeller hub. A further inspection of the separated propeller blade indicated that the failure occurred within the outboard blade retention threads.
Probable Cause: While in cruise flight a separation of a propeller blade as a result of a propeller hub crack. Factors contributing to the accident included the installation of an unapproved propeller, and the failure to properly service the propeller with red dyed oil for crack protection.
Accident investigation:
 |
|
Sources:
NTSB SEA05LA121
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 10-Oct-2022 07:54 | ASN Update Bot | Added |
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