ASN Wikibase Occurrence # 364169
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| Date: | Tuesday 10 December 1991 |
| Time: | 09:55 LT |
| Type: |  Bell 206L-3 |
| Owner/operator: | Bell Helicopter Textron |
| Registration: | N2770X |
| MSN: | 51022 |
| Total airframe hrs: | 3577 hours |
| Engine model: | Allison 250C-30P |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Arlington, TX -
 United States of America
|
| Phase: | Landing |
| Nature: | Unknown |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE EXPERIMENTAL CERTIFICATED HELICOPTER WAS BEING TEST FLOWN AS PART OF THE HEIGHT VELOCITY DIAGRAM DEVELOPMENT FOR THE 206L4 CERTIFICATION PROGRAM. THE TEST PILOT WAS CONDUCTING ABORTED TAKEOFFS WHEN AT 30 FEET AND 50 KNOTS HE INITIATED AN AUTOROTATION. THE COLLECTIVE WAS LOWERED SLIGHTLY AND A HIGH DESCENT RATE OCCURRED. DURING THE DESCENT THE MAIN ROTOR RPM DECREASED AND THE HELICOPTER LANDED HARD RESULTING IN TAILBOOM BUCKLING AND SEPARATION OF THE TAIL ROTOR DRIVE SHAFT. THE PILOT'S APPLICATION OF COLLECTIVE BEFORE TOUCHDOWN DID NOT ARREST THE DESCENT RATE.
Probable Cause: THE HELICOPTER'S AUTOROTATIONAL LANDING PERFORMANCE CAPABILITY WAS EXCEEDED. FACTORS WERE THE PROPER DESCENT RATE WAS NOT POSSIBLE FOR THE PIC AND SUFFICIENT INFORMATION FROM THE MANUFACTURER WAS NOT PROVIDED.
Accident investigation:
 |
|
Sources:
NTSB FTW92LA040
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 19-Mar-2024 12:17 | ASN Update Bot | Added |
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