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ASN Wikibase Occurrence # 166493
Last updated: 19 December 2019
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Type:Silhouette image of generic UH1 model; specific model in this crash may look slightly different
Bell (Williams) UH-1H Iroquois
Owner/operator:Archer Aviation Inc
Registration: N260TA
C/n / msn: 70-15750
Fatalities:Fatalities: 0 / Occupants: 1
Aircraft damage: Substantial
Location:near Waitsburg, 15 miles NE of Prescott, WA -   United States of America
Phase: Take off
Departure airport:Waitsburg, WA
Destination airport:Waitsburg, WA
Investigating agency: NTSB
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. 


FAA register:

Revision history:

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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