ASN Wikibase Occurrence # 385629
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| Date: | Tuesday 10 July 2001 |
| Time: | 10:30 LT |
| Type: | Bell 47 |
| Owner/operator: | Talon Air Inc., |
| Registration: | N8478D |
| MSN: | 1697 |
| Year of manufacture: | 1957 |
| Total airframe hrs: | 10378 hours |
| Engine model: | Lycoming OV-435-A1D |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Indianola, MS -
 United States of America
|
| Phase: | En route |
| Nature: | Agricultural |
| Departure airport: | Indianola, MS |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that while enroute to the next field to be sprayed, at 500 feet, the engine lost power. After attempts to restore full power, the pilot selected a nearby field. During the autorotative touchdown, the helicopter rolled over on the right side. During the engine examination, metal particles were recovered from the engine oil pump screen and the engine oil filter element. Further examination showed that # 1 cylinder connecting rod cap was wedged between the second crankshaft lobe and the engine case. The examination of the helicopter also revealed that the landing skid and cross-tubs were fractured into several pieces. The fracture examination showed all fractures were in overload. The engine had accumulated a total of 935.1 hours since the last major overhaul.
Probable Cause: The pilot's improper use of flight controls during an autorotation that resulted inn the collapse of the skids and cross tube assembly. A factor was the loss of engine power due to the failure of # 1 connecting rod and the overload failure of the skids and cross tub assembly.
Accident investigation:
 |
|
Sources:
NTSB ATL01LA075
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 05-Apr-2024 06:12 | ASN Update Bot | Added |
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