ASN Wikibase Occurrence # 30381
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| Date: | Thursday 7 October 1999 |
| Time: | 18:00 LT |
| Type: |  Bell 206B-3 JetRanger III |
| Owner/operator: | Texas Dept. Of Public Safety |
| Registration: | N21166 |
| MSN: | 3447 |
| Year of manufacture: | 1981 |
| Total airframe hrs: | 6651 hours |
| Engine model: | Allison 250-C20J |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Slaton Municipal Airport, Slaton, Texas -
 United States of America
|
| Phase: | Landing |
| Nature: | Unknown |
| Departure airport: | Lubbock, TX (KLBB) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
During a 300-foot agl practice 180-degree autorotation, approximately 90 degrees into the turn, the pilot allowed 'a high sink-rate to develop', and began to pull pitch to arrest the descent. The pilot started to 'roll the throttle' open and he observed the N2 and Nr needles join at 92 percent. At this point, the left 180-degree turn was completed, and the aircraft rolled out parallel to and west of the runway with approximately 40 knots indicated airspeed. The pilot continued to roll on throttle and increase the collective in order 'to hold the helicopter about 3 feet above the ground.' However, the 'rotor rpm decreased too low', and the helicopter settled to the ground and slid approximately 60 feet. The left skid toe and lower wire cutter dug into the ground, and the helicopter rocked forward onto the toes of the skids. Subsequently, the main rotor blades contacted and severed the tail boom, and the helicopter rolled over, and came to rest on its left side. The operator stated that 'this maneuver could be entered from a higher agl altitude, this would have prevented the accident.'
Probable Cause: The pilot's initiation of the simulated emergency procedure at a low altitude.
Accident investigation:
 |
|
Sources:
NTSB FTW00TA007
FAA register: NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20001212X19970&key=1
FAA register: 2. FAA: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=21166
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 27-Sep-2008 01:00 | ASN archive | Added |
| 12-Apr-2015 15:49 | Dr. John Smith | Updated [Time, Total fatalities, Total occupants, Other fatalities, Location, Country, Phase, Nature, Departure airport, Destination airport, Source, Damage, Narrative] |
| 12-Apr-2015 15:54 | Dr. John Smith | Updated [Source, Narrative] |
| 14-Dec-2017 09:42 | ASN Update Bot | Updated [Time, Operator, Nature, Departure airport, Destination airport, Source, Damage, Narrative] |
| 07-Apr-2024 17:25 | ASN Update Bot | Updated [Time, Other fatalities, Phase, Departure airport, Source, Narrative, Category, Accident report] |
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