ASN Wikibase Occurrence # 249230
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| Date: | Friday 26 March 2021 |
| Time: | 15:15 LT |
| Type: |  Robinson R44 II |
| Owner/operator: | Brush Popper Aviation LLC |
| Registration: | N178DF |
| MSN: | 11969 |
| Year of manufacture: | 2007 |
| Total airframe hrs: | 2347 hours |
| Engine model: | Lycoming IO-540-AE1A5 |
| Fatalities: | Fatalities: 0 / Occupants: 4 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Henrietta, OK -
 United States of America
|
| Phase: | Landing |
| Nature: | Survey |
| Departure airport: | Henryetta, OK (F10) |
| Dustin, OK | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot of the helicopter stated that, while maneuvering 'low and slow' with three passengers onboard, he noticed 'insufficient power' and shortly thereafter, the low rotor rpm warning annunciated. He applied full throttle and attempted to regain rotor rpm but was unsuccessful. The pilot stated that he was forced to land immediately, during which the helicopter impacted a tree then terrain, resulting in substantial damage.
The pilot reported that there were no mechanical malfunctions or failures of the helicopter and recommended operating 'at a lower gross weight.' Postacccident examination of the helicopter revealed no anomalies that would have precluded normal operation.
Probable Cause: The pilot's insufficient monitoring of the helicopter's power while flying at low altitude and at low airspeed, which resulted in the loss of rotor rpm and impact with a tree and terrain.
Accident investigation:
 |
|
Sources:
NTSB CEN21LA173
FAA register: https://registry.faa.gov/aircraftinquiry/Search/NNumberResult?NNumbertxt=178DF
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 29-Mar-2021 19:19 | harro | Added |
| 21-Aug-2022 19:11 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Nature, Departure airport, Destination airport, Source, Narrative, Category, Accident report] |
Corrections or additions? ... Edit this accident description
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