ASN Wikibase Occurrence # 289353
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| Date: | Friday 29 April 2011 |
| Time: | 18:30 LT |
| Type: |  Hughes 269B |
| Owner/operator: | Heartland Helicopters LLC |
| Registration: | N9561F |
| MSN: | 200450 |
| Year of manufacture: | 1970 |
| Total airframe hrs: | 4454 hours |
| Engine model: | Lycoming HIO-360-A1A |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Edgerton, Indiana -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Agricultural |
| Departure airport: | Edgerton, IN |
| Edgerton, IN | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported a vibration in the helicopter antitorque pedals and a subsequent loss of directional control. The pilot initiated an autorotation to a field, and the helicopter sustained damage to the left landing skid and fuselage. A postaccident examination revealed that the tail rotor drive shaft failed due to an overstress fracture that resulted from contact with the tailboom bulkhead. Examination of the tailboom support structure was unable to determine the underlying cause of the contact between the tailboom and drive shaft. The operator reported that he was not aware of any events prior to the accident that would have compromised the tailboom support structure.
Probable Cause: A loss of clearance between the tail rotor drive shaft and the tailboom bulkhead for undetermined reasons, which resulted in the overstress failure of the drive shaft.
Accident investigation:
 |
|
Sources:
NTSB CEN11LA315
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 05-Oct-2022 12:44 | ASN Update Bot | Added |
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