Probable cause
The loss of rotor RPM for reasons that could not be determined based on available evidence.
NTSB analysis
The pilot and two passengers were completing an aerial gunning flight. The helicopter was flying at 80 ft above ground level (agl), when the pilot heard the “rotors droop” and the “engine bog down.” He stated that he applied right pedal and increased the throttle input, but the engine did not respond. The helicopter descended into the trees and impacted the ground. The main rotor blades and fuselage sustained substantial damage. The investigation was unable to determine the airspeed of the helicopter and the reason for the loss of rotor RPM based on the available evidence. A postaccident examination and engine functional test run revealed no evidence of mechanical malfunctions or failures that would have precluded normal operation.
Text from the NTSB. Open the NTSB docket for CEN21LA155 for the full record.
Event
- Date
- Feb 26, 2021
- Type
- Accident
- Place
- Dunn, Texas
- Highest injury
- None
- Weather
- Visual (VMC)
- Light
- Day
Robinson Helicopter R44
- N-number
- N7184N
- Category
- Helicopter
- Year built
- 1999
- Damage
- Substantial
- Operating rule
- Part 91 (general aviation)
- Purpose of flight
- Other work use
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.