Gentry died when the helicopter he was riding in crashed just a few hours before a concert Montgomery Gentry were slated to perform in Medford, N.J., on September 8.
After talking with the helicopter owner's flight instructor and another certified helicopter flight instructor, Robinson chose to stop the helicopter's engine at 950 feet above the ground and perform an autorotation which investigators say he had performed numerous times before. Authorities said the pilot of the helicopter reported mechanical problems moments before it crashed in New Jersey.
The report indicated that investigators reviewed police video footage of the helicopter's approach to the airport that showed it begin its attempt to glide to an emergency landing. The preliminary NTSB report does not assign blame or pinpoint the cause of the crash.
The autorotation was reportedly attempted at 950 feet above the runway, before the helicopter plummeted to the ground. "Toward the end of the video, the descent profile became more vertical and the rate of descent increased before the helicopter descended out of view".
The crash on Friday killed both Troy and the pilot, who were the only two on board.
Gentry was on the helicopter "purely for pleasure", TMZ reports from the NTSB document.
Country music turned to social media to mourn Gentry's death.
Fox 8 News reports that Gentry will be honored at Nashville's Grand Ole Opry House on Thursday, Sept. 14.
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