Probable cause
A total loss of engine power for reasons that could not be determined because postaccident examination of the airframe and engine did not reveal any anomalies that would have precluded normal operation.
NTSB analysis
The pilot reported that, after trimming the top portion of a tree during helicopter tree-trimming operations, the engine experienced a gradual loss of power. The rotor rpm then began to decrease, and the "engine out" alarm illuminated and sounded. The pilot maneuvered to avoid power lines; however, during the descent, the rotor blades struck a power line pole, and the helicopter impacted the ground, which resulted in substantial damage to all five main rotor blades and the left landing skid. Postaccident examination of the engine and airframe and the air, fuel, and oil systems revealed no anomalies that could have contributed to the loss of power.
Text from the NTSB. Open the NTSB docket for ERA13LA344 for the full record.
Event
- Date
- Jul 29, 2013
- Type
- Accident
- Place
- Center Point, West Virginia
- Highest injury
- Minor
- Minor injuries
- 1
- Weather
- Visual (VMC)
- Light
- Day
Hughes 369D
- N-number
- N31HM
- Category
- Helicopter
- Year built
- 1977
- Damage
- Substantial
- Operating rule
- Part 133 (external load)
- Purpose of flight
- External load
From the NTSB aviation accident database: N-registered aircraft, events since 2008, data through Oct 28, 2026. The file is published monthly, so the latest weeks are incomplete and recent records can change. The official source is the NTSB aviation investigation search. CheckAero is independent and not affiliated with the NTSB.