ASN Wikibase Occurrence # 30954
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| Date: | Thursday 18 June 1998 |
| Time: | 16:15 LT |
| Type: |  Bell 206L-4 LongRanger IV |
| Owner/operator: | Bell Helicopter Textron Inc. |
| Registration: | N8094L |
| MSN: | 52125 |
| Year of manufacture: | 1994 |
| Total airframe hrs: | 241 hours |
| Engine model: | Allison 250-C30P |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | near Hurst, Texas -
 United States of America
|
| Phase: | Taxi |
| Nature: | Training |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The flight instructor lost control of the helicopter while demonstrating the technique for recovering from a loss of tail rotor effectiveness while hovering over a helipad. After assuming the controls for the demonstration, the instructor noticed that the RPM was set too low, at 99 percent. The instructor elected to 'beep up' the RPM by stabilizing the cyclic with his left hand and 'beeping' the RPM with the right thumb. He was unsuccessful in beeping the RPM up on 2 attempts. On his last attempt, while manipulating the cyclic lever with his left hand and the RPM switch with the thumb of his right hand, and keeping his eyes on the engine tachometer, the helicopter assumed a nose high attitude while drifting backwards. The flight instructor was not able to recover the helicopter in time to avoid impact with the ground. The winds at the time of the accidents were reported from the south at 27 knots.
Probable Cause: The flight instructor's failure to maintain control of the helicopter while attempting to increase the engine RPM while hovering. Factors were the prevailing high winds and the instructor's diverted attention.
Accident investigation:
 |
|
Sources:
NTSB FTW98LA274
FAA register: 2. FAA: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=8094L
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 27-Sep-2008 01:00 | ASN archive | Added |
| 07-Apr-2015 23:22 | Dr. John Smith | Updated [Time, Operator, Total fatalities, Total occupants, Other fatalities, Location, Country, Phase, Nature, Departure airport, Source, Damage, Narrative] |
| 07-Apr-2024 10:56 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Phase, Departure airport, Source, Damage, Narrative, Category, Accident report] |
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