ASN Wikibase Occurrence # 367665
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| Date: | Saturday 25 November 1989 |
| Time: | 13:00 LT |
| Type: |  Bell 47G-3B1 |
| Owner/operator: | Bill Williams |
| Registration: | N1358X |
| MSN: | 6569 |
| Year of manufacture: | 1966 |
| Total airframe hrs: | 3717 hours |
| Engine model: | LYCOMING TVO-435-B1B |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Ewell, AL -
 United States of America
|
| Phase: | Approach |
| Nature: | Private |
| Departure airport: | Ozark, AL (71J) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PRIVATE RATED PILOT HAD ATTEMPTED A PRACTICE 180 DEGREE AUTOROTATION. IT WAS ABORTED BY THE INSTRUCTOR BECAUSE OF IMPROPER LINE UP BY THE PILOT UNDER INSTRUCTION. A SECOND AUTOROTATION WAS ATTEMPTED BY THE INSTRUCTOR TO DEMONSTRATE CORRECT PROCEDURE. THE INSTRUCTOR REPORTED THAT THE ENGINE DID NOT RESPOND TO AN ATTEMPTED POWER RECOVERY. HE ADDED COLLECTIVE PITCH TO AVOID TREES AND REACHED AN OPEN FIELD WITH LOW ROTOR RPM. THE HELICOPTER IMPACTED HARD & WAS SUBSTANTIALLY DAMAGED. LATER EXAMINATION OF THE ENGINE DID NOT REVEAL ANY DISCREPANCIES WHICH ACCOUNTED FOR THE REPORTED LOSS OF POWER.
Probable Cause: THE LOSS OF ENGINE POWER, FOR UNDETERMINED REASONS, AT LOW ALTITUDE DURING A PRACTICE AUTOROTATION. CONTRIBUTING TO THE ACCIDENT WAS THE INSTRUCTOR'S FAILURE TO PROPERLY PLAN THE DEMONSTRATED AUTOROTATION SO AS TO PRECLUDE AN ACCIDENT, IN THE EVENT THAT POWER WAS NOT AVAILABLE.
Accident investigation:
 |
|
Sources:
NTSB ATL90LA030
History of this aircraft
Other occurrences involving this aircraft
| 13 July 1970 | N1358X | Western Helico | 0 | near Elfrida, AZ | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 22-Mar-2024 17:32 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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