ASN Wikibase Occurrence # 368806
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| Date: | Thursday 11 May 1989 |
| Time: | 09:20 LT |
| Type: |  Hughes 269A |
| Owner/operator: | Alabama Avi. & Tech. College |
| Registration: | N9049J |
| MSN: | 75-0345 |
| Total airframe hrs: | 5116 hours |
| Engine model: | LYCOMING HIO-360 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Ozark, AL -
 United States of America
|
| Phase: | Landing |
| Nature: | Training |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
DURING HELICOPTER INSTRUCTIONAL FLT A STRAIGHT-IN TOUCHDOWN AUTOROTATION WAS ATTEMPTED. THE PLT SAID WITNESSES OBSERVED THE TAIL BOOM COME UP INTO THE TIP PATH PLANE. THAT EVENT USUALLY OCCURS WHEN TOUCH DOWN IS MADE ON THE HEEL OF THE SKIDS & THE MAIN ROTOR IS STILL PITCHED AFT BECAUSE OF CYLIC INPUT FOR THE LANDING FLARE. AS THE HELICOPTER ROCKS FORWARD AFTER THE HARD LANDING ON THE SKID HEEL, THE TAIL BOOM WILL BE SEVERED BY THE DISPLACED MAIN ROTOR. FOLLOWING THE TAIL BOOM SEPARATION THE HELICOPTER ROTATED ABOUT 120 DEGREES TO THE LEFT.
Probable Cause: THE PILOT'S EXCESSIVE USE OF THE CYCLIC CONTROL AND THE MISJUDGED FLARE DURING A PRACTICE TOUCHDOWN AUTOROTATION.
Accident investigation:
 |
|
Sources:
NTSB ATL89LA145
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Mar-2024 07:35 | ASN Update Bot | Added |
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