WYOMING HELICOPTERS INC DBA: http://registry.faa.gov/N97TH
FAA Flight Standards District Office: FAA Casper FSFO-04
NTSB Identification: CEN16LA330
14 CFR Part 137: Agricultural
Accident occurred Tuesday, August 23, 2016 in Cokeville, WY
Aircraft: HILLER UH 12D, registration: N97TH
Injuries: 1 Minor.
This is preliminary information, subject to change, and may contain errors. Any errors in this report will be corrected when the final report has been completed. NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.
On August 23, 2016, about 0745 mountain daylight time, a Hiller UH-12D helicopter, N97TH, impacted terrain near Cokeville, Wyoming. The commercial rated pilot received minor injuries and the helicopter was substantially damaged during the accident. The helicopter was registered to and operated by Wyoming Helicopters, Inc., Boulder, Wyoming, under the provisions of 14 Code of Federal Regulations Part 137 as an agricultural flight. Visual meteorological conditions prevailed at the time.
The Federal Aviation Administration (FAA) inspector reported that on the day of the accident the pilot had completed several agricultural flights. The pilot then was cleaning the spray system by it with flushing with water, on a final flight. During the flight, when the helicopter was about 10-15 ft off the ground, a control rotor cuff separated from the helicopter. The helicopter impacted terrain. The helicopter came to rest on its side/roof, and the tail boom had separated in the crash. The cuff was located about 50 yds from the helicopter wreckage.
The helicopter was retained for further examination.