Enstrom Helicopter CORP 280C accident near Kerens, Texas, May 10, 2018

The NTSB's narrative final · quoted from the NTSB record

The helicopter had recently undergone some major maintenance, andthe private pilotwas picking up the helicopter to return to his residence. The helicopter departed for the accident flight with about 35 gallons of fuel onboard for the 1.5-hour flight. During the flight, the pilot noticed that the transmission and cylindertemperatures had increased. The pilot subsequently performed an off-airport landing in a field,kept the engine running, and waited for the temperatures to return to normal. After the temperatures returned to normal, the pilot departed. While maneuveringat 1,000 ft above ground level about 1.5 miles from his residence, the pilot heard a noise or “bang” sound. The engine then lost total power, and the pilot initiated an autorotation, during which the helicopter impacted trees and terrainand then came to rest upright. Postaccident examination of the helicopter revealed no evidence of any preimpact mechanical failures or malfunctions that would have precluded normal operation. The examination revealed that both fuel tanks were empty and that the fuel system was not breached. Given that the pilot conducted an unplanned landing and takeoff, he should have accounted for the extra fuel used as he managed the fuel in flight. However, he did not do so, and his inadequate in-flight fuel management likely led to the loss of engine power due to fuel exhaustion.

The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.