NTSB Identification: CEN17LA229
14 CFR Part 91: General Aviation
Accident occurred Saturday, June 10, 2017 in Tallulah, LA
Probable Cause Approval Date: 10/02/2017
Aircraft: HUGHES 269C, registration: N7482F
Injuries: 1 Uninjured.
NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.
The commercial pilot reported that the helicopter’s engine start and run-up were normal. At full power for takeoff, the helicopter began to vibrate. The pilot “rolled the throttle off” and lowered the collective; however, the vibrations became worse and the helicopter “began to destroy itself.” He reported that he had not re-centered before the cyclic trim before takeoff as noted on the checklist, and it remained at a nearly full-forward position from the previous flight. He noted that if the cyclic had been centered, the vibrations would have stopped. However, with the trim full forward, the rotor blades began hitting the stops, causing the vibrations. The pilot added that there were no malfunctions or failures with the helicopter before the accident.
The National Transportation Safety Board determines the probable cause(s) of this accident as follows:
The pilot's failure to reset the cyclic trim before takeoff, which resulted in ground resonance.
Aviation Accident Factual Report - National Transportation Safety Board: https://app.ntsb.gov/pdf
NTSB Identification: CEN17LA229
14 CFR Part 91: General Aviation
Accident occurred Saturday, June 10, 2017 in Tallulah, LA
Aircraft: HUGHES 269C, registration: N7482F
Injuries: 1 Uninjured.
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 June 10, 2017, about 1320 central daylight time, a Hughes 269C helicopter, N7482F, was substantially damaged during a ground resonance event at the Vicksburg Tallulah Regional Airport (TVR), Tallulah, Louisiana. The pilot was not injured. The helicopter was registered to Wade and Son, Inc., and operated by the pilot as a 14 Code of Federal Regulations Part 91 instructional flight. Day visual meteorological conditions prevailed at the accident site. The flight was not operated on a flight plan. The local flight was originating at the time of the accident.
The pilot reported that the cyclic trim was not re-centered before takeoff as noted on the checklist. Instead, it remained at a nearly full forward position from the previous flight. The engine start and run-up were normal. At full power for takeoff, the helicopter began to vibrate. The pilot "rolled the throttle off" and lowered the collective; however, the vibrations became worse and the helicopter "began to destroy itself." He noted that if the cyclic had been centered, the vibrations would have stopped. However, with the trim full forward, the rotor blades began hitting the stops causing the vibrations. The pilot added that there were no malfunctions or failures with the helicopter before the accident.
The helicopter came to rest upright on the airport ramp. A postaccident examination revealed that the engine had partially separated from the airframe and the main rotor gearbox had separated from the rear bulkhead. The landing skid dampers appeared intact, with no visible damage or fluid leakage.
The National Transportation Safety Board did not travel to the scene of this accident.
Additional Participating Entity:
Federal Aviation Administration / Flight Standards District Office; Jackson, Mississippi
Aviation Accident Preliminary Report - National Transportation Safety Board: https://app.ntsb.gov/pdf
NTSB Identification: CEN17LA229
14 CFR Part 91: General Aviation
Accident occurred Saturday, June 10, 2017 in Tallulah, LA
Aircraft: HUGHES 269C, registration: N7482F
Injuries: 1 Uninjured.
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 June 10, 2017, about 1320 central daylight time, a Hughes 269C helicopter, N7482F, was substantially damaged during a ground resonance event at the Vicksburg Tallulah Regional Airport (TVR), Tallulah, Louisiana. The pilot was not injured. The helicopter was registered to Wade and Son, Inc., and operated by the pilot as a 14 Code of Federal Regulations Part 91 instructional flight. Day visual meteorological conditions prevailed at the accident site. The flight was not operated on a flight plan. The local flight was originating at the time of the accident.
The pilot reported that when he increased engine power for liftoff the helicopter entered ground resonance. He reduced engine power and lowered the collective. He subsequently shut the helicopter down.
The helicopter came to rest upright on the airport ramp. An initial postaccident examination revealed that the engine had partially separated from the airframe and the main rotor gearbox had separated from the rear bulkhead during the event.
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