ASN Wikibase Occurrence # 290461
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| Date: | Friday 25 July 2014 |
| Time: | 08:23 LT |
| Type: |  Grumman G-164B Tubo Ag-Cat |
| Owner/operator: | Croom Aviation |
| Registration: | N425LS |
| MSN: | 598B |
| Year of manufacture: | 1979 |
| Total airframe hrs: | 3784 hours |
| Engine model: | Pratt & Whitney PT6A-27 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Bonifay, Florida -
 United States of America
|
| Phase: | En route |
| Nature: | Ferry/positioning |
| Departure airport: | Donalsonville, GA (17J) |
| Bonifay, FL (1J0) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The commercial pilot was conducting a cross-country positioning flight in the turboprop airplane. The pilot reported that, while on approach to the destination airport, the propeller began wind-milling, and "pieces of metal" began coming out of the right engine exhaust duct. The pilot subsequently conducted a forced landing, during which the airplane struck trees.
Postaccident examination of the engine revealed that the No. 2 bearing oil nozzle jet was partially blocked, which resulted in oil starvation and the subsequent disintegration of the No. 2 roller bearing. The material blocking the oil nozzle jet was consistent with material used in the composition of the bearing races and rollers.
A review of maintenance records revealed that the No. 1 engine bearing had failed about 1,000 flight hours before the accident and was replaced along with the No. 2 bearing. In addition, the Nos. 1 through 5 bearings were replaced about 300 flight hours before the accident. The investigation could not determine if the No. 2 bearing oil nozzle jet was blocked by bearing material as a result of the previous bearing failure or if the blockage developed during the engine's subsequent operation.
Probable Cause: A partial blockage of the No. 2 bearing oil nozzle jet by bearing material, which resulted in oil starvation and the subsequent failure of the No. 2 bearing and total loss of engine power.
Accident investigation:
 |
|
Sources:
NTSB ERA14LA368
History of this aircraft
Other occurrences involving this aircraft
| 18 September 2008 | N425LS | B | 0 | Patterson, LA | |
sub |
| Fuel contamination | ||||||
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 06-Oct-2022 15:24 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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