ASN Wikibase Occurrence # 265331
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| Date: | Sunday 20 June 2021 |
| Time: | 09:21 LT |
| Type: |  Robinson R44 II |
| Owner/operator: | White Bear Industries Ltd. |
| Registration: | C-FWBL |
| MSN: | 14095 |
| Year of manufacture: | 2017 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | 15 NM NE of the Terrace Airport (CYXT), BC -
 Canada
|
| Phase: | En route |
| Nature: | Unknown |
| Departure airport: | Lakelse Lake, BC |
| Fort Nelson-Northern Rockies Regional Airport, BC (YYE/CYYE) | |
| Investigating agency: | TSB |
| Confidence Rating: |  Information verified through data from accident investigation authorities |
A privately registered Robinson R44 II, operated by White Bear Industries Ltd. was enroute from Lakelse Lake, BC to Fort Nelson Airport (CYYE), BC, when the pilot with one passenger on board, received a low main rotor RPM warning horn and light, with both engine and main rotor tachometer needles decreasing. The pilot performed a forced landing on a mountain logging road approximately 15 NM NE of the Terrace Airport (CYXT), BC. He noticed while in the auto-rotation descent that the reciprocating engine RPM was fluctuating (Lycoming IO-540-AE1A5, 6 cylinder, fuel injected). During the flare to touch down with collective and aft cyclic application to arrest the descent and forward motion, the helicopter skidded forward for about 15 feet on the gravel road. The helicopter remained upright on its skids, and both the pilot and passenger exited
with no injury. The helicopter suffered substantial damage when the main rotor struck the tail boom during touchdown. The tail boom remained only partially attached to the rest of the structure by the internal driveshaft assembly connected to the tail rotor gearbox. Maintenance was contracted to inspect the helicopter drivetrain and initially could not find or replicate any defect that would suggest a mechanical malfunction or explain the low main rotor RPM reported by the pilot.
Sources:
TSB
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 11-Jul-2021 07:54 | harro | Added |
| 15-Nov-2023 18:04 | harro | Updated [Other fatalities, Destination airport, Narrative] |
Corrections or additions? ... Edit this accident description
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