ASN Wikibase Occurrence # 44555
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| Date: | Monday 21 February 2005 |
| Time: | 13:39 |
| Type: |  Bell 206L-1 LongRanger II |
| Owner/operator: | Air Evac Lifeteam |
| Registration: | N5734M |
| MSN: | 45449 |
| Year of manufacture: | 1980 |
| Total airframe hrs: | 23135 hours |
| Fatalities: | Fatalities: 1 / Occupants: 4 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Gentry, AK -
 United States of America
|
| Phase: | Take off |
| Nature: | Ambulance |
| Departure airport: | Gentry, AR |
| Springdale, AR | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
On February 21, 2005, at 1339 central standard time, a single-engine Bell 206-L1 helicopter, N5734M, operated by Air Evac Lifeteam was substantially damaged during a hard landing following a loss of control while hovering out of ground effect near Gentry, Arkansas. The commercial pilot, the flight nurse, and the paramedic were seriously injured and the patient was fatally injured. The helicopter was registered to Air Evac Leasing Corporation, of West Plains, Missouri, d/b/a Air Evac Lifeteam, and was destined for Springdale, Arkansas. No flight plan was filed and visual meteorological conditions prevailed for the air medical transport flight conducted under 14 Code of Federal Regulations Part 135.
The purpose of the air medical flight was to pick up a patient who had been involved in a motor vehicle accident in a rural area, and to transport him to a hospital. The helicopter landed to the north on the front lawn of a private residence. After the patient was boarded, the commercial pilot attempted to determine the wind direction, but found no visual cues. However, he estimated the winds were about 10-15 knots from between 330 and 030 degrees. He stated that he had encountered similar winds while en route to the landing zone. A second EMS pilot who arrived at the scene after the accident stated that the winds were from 030 to 050 at 10 knots. The accident pilot stated that he brought the helicopter to a hover and maneuvered the helicopter to the right to avoid power lines that crossed the residential property. The pilot stated that when he departed, he began a vertical ascent but was trying not to increase the collective above the available torque. He stated that he was concerned about clearing the power lines and losing tail rotor effectiveness. When the helicopter reached an altitude abeam of the power lines, it began an uninitiated spin to the right. The pilot stated that the torque was near 100 percent. He applied full left torque pedal, and attempted to gain forward airspeed. He also used the cyclic to follow the nose of the aircraft in an attempt to fly out of the turn. The pilot was unable to gain airspeed and the helicopter continued to spin to the right and to descend. The pilot initiated an autorotation by lowering the collective and placing the throttle in the idle position, which he stated stopped the spinning. When the helicopter was about 10 to 20 feet above ground, the pilot placed the collective in the full-up position to cushion the landing. However, there was not sufficient main rotor rpm to stop the high rate of descent and the helicopter landed hard in a field adjacent to the private residence. Examination of the helicopter revealed no preimpact structural, system, or other mechanical anomalies. A critical wind azimuth in the Bell 206-L1 flight manual indicated an increased risk of loss of tail rotor effectiveness when winds are encountered between 050 and 210 degrees.
Probable Cause: The pilot’s improper decision to maneuver in an environment conducive to a loss of tail rotor effectiveness.
Accident investigation:
 |
|
Sources:
NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20050302X00252&key=1
FAA register: 2. FAA: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?omni=Home-N-Number&nNumberTxt=5734M
Location
Images:
Photos: NTSB
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 28-Oct-2008 00:45 | ASN archive | Added |
| 22-Aug-2016 11:47 | Dr.John Smith | Updated [Time, Operator, Location, Nature, Departure airport, Destination airport, Source, Narrative] |
| 25-Sep-2016 16:32 | Aerossurance | Updated [Time, Operator, Location, Departure airport, Destination airport, Narrative] |
| 21-Dec-2016 19:24 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 06-Dec-2017 07:01 | ASN Update Bot | Updated [Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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