ASN Wikibase Occurrence # 373519
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| Date: | Monday 23 February 1987 |
| Time: | 14:45 LT |
| Type: |  Bell 47G |
| Owner/operator: | Allied Helicopter Services,inc |
| Registration: | N6330D |
| MSN: | 1044 |
| Year of manufacture: | 1956 |
| Total airframe hrs: | 6480 hours |
| Engine model: | FRANKLIN 6VS-335 SER |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Sand Springs, OK -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Training |
| Departure airport: | Tulsa, OK (5F2) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
INSTRUCTOR PLT WAS DEMONSTRATING A CONFINED AREA TAKEOFF TO THE PVT PLT TAKING ADVANCE INSTRUCTION. AS THE ACFT CLEARED THE BARRIERS, THE QUARTERING HEAD WIND SHIFTED TO A TAIL WIND AND THE ACFT LOST TRANSLATIONAL LIFT. APPLICATION OF FULL POWER DID NOT REMEDY THE SITUATION AND THE ACFT LOST ROTOR RPM. ACFT SETTLED INTO THE TREES BEFORE THE INSTRUCTOR COULD REESTABLISH A CLIMB. A TAIL WIND WOULD SUBSTANTIALLY INCREASE THE POWER REQUIREMENT FOR THE MANEUVER THAT WAS BEING ATTEMPTED.
Probable Cause:
Accident investigation:
 |
|
Sources:
NTSB FTW87LA069
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 27-Mar-2024 13:58 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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