ASN Wikibase Occurrence # 166493
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| Date: | Friday 23 May 2014 |
| Time: | 16:02 |
| Type: |  Bell (Williams) UH-1H Iroquois |
| Owner/operator: | Archer Aviation Inc |
| Registration: | N260TA |
| MSN: | 70-15750 |
| Year of manufacture: | 1970 |
| Total airframe hrs: | 8315 hours |
| Engine model: | Honeywell T-53-703 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | near Waitsburg, 15 miles NE of Prescott, WA -
 United States of America
|
| Phase: | Take off |
| Nature: | Ferry/positioning |
| Departure airport: | Waitsburg, WA |
| Waitsburg, WA | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The commercial pilot was conducting an agricultural cherry drying flight in the helicopter. Surveillance video showed the helicopter lift off the ground into a momentary low hover, climb and move forward and upward, and then immediately descend while rolling toward its right side until it impacted the ground. The pilot stated that the initial takeoff into the hover felt normal and that he then increased the altitude to get out of a dust cloud generated by the helicopter. As he transitioned the helicopter to forward flight, it experienced a “violent” one-to-one vibration that continued to increase as the helicopter continued forward. The pilot aborted the takeoff and subsequently lost control of the helicopter while attempting to land.
Postaccident wreckage examination did not reveal any anomalies that would have precluded normal operation.
Probable Cause: An extreme vibration immediately after entering forward flight for reasons that could not be determined because postaccident examination of the helicopter did not reveal any anomalies that would have precluded normal operation. Contributing to the accident was the pilot’s inability to maintain helicopter control during the landing.
Accident investigation:
 |
|
Sources:
NTSB
FAA register: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=260TA
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-May-2014 08:52 | gerard57 | Added |
| 24-May-2014 17:14 | Geno | Updated [Time, Aircraft type, Registration, Cn, Location, Departure airport, Source, Damage, Narrative] |
| 24-May-2014 18:18 | Geno | Updated [Registration] |
| 28-May-2014 19:30 | Geno | Updated [Source, Narrative] |
| 21-Dec-2016 19:28 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 27-Jul-2017 21:23 | Aerossurance | Updated [Location, Departure airport, Destination airport, Narrative] |
| 19-Aug-2017 16:48 | ASN Update Bot | Updated [Operator, Other fatalities, Nature, Departure airport, Destination airport, Source, Narrative] |
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