ASN Wikibase Occurrence # 358814
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| Date: | Friday 23 June 1995 |
| Time: | 17:00 LT |
| Type: |  Bell 47G-2 |
| Owner/operator: | Heli Flight Ag Service, Inc. |
| Registration: | N1968H |
| MSN: | |
| Total airframe hrs: | 11604 hours |
| Engine model: | LYCOMING VO-435-A1F |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Zillah, WA -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Agricultural |
| Departure airport: | Buena, WA |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PILOT WAS MANEUVERING THE HELICOPTER ABOUT 50 FT AGL WHEN HE SUDDENLY LOST LATERAL CYCLIC CONTROL. THE HELICOPTER BEGAN TO ROLL LEFT DESPITE THE PILOT'S EFFORTS TO CORRECT. THE MAIN ROTOR BLADES CONTACTED TREES AND THE HELICOPTER CARTWHEELED INTO THE GROUND. EXAMINATION REVEALED THAT A PORTION OF THE LEFT CYCLIC CONTROL ROD HAD FAILED. FURTHER METALLURGICAL EXAMINATION SHOWED THAT THE FAILURE WAS DUE TO SEVERE CORROSION. AN EXAMINATION OF THE MAINTENANCE RECORDS REVEALED THAT THE HELICOPTER HAD NOT RECEIVED AN ANNUAL INSPECTION IN OVER TWO YEARS.
Probable Cause: THE FAILURE OF COMPANY MAINTENANCE PERSONNEL TO PERFORM ADEQUATE INSPECTIONS OF THE HELICOPTER, AND THE FAILURE OF THE CYCLIC CONTROL ROD DUE TO CORROSION.
Accident investigation:
 |
|
Sources:
NTSB SEA95LA126
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 14-Mar-2024 18:28 | ASN Update Bot | Added |
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