What happened
At approximately 12:45 PDT, a Robinson R44 Astro helicopter, registered C-FKAJ, departed from the Kootenay Valley Helicopters Ltd. heliport near Creston, British Columbia. The aircraft was being operated by a student pilot on a solo training flight intended to practice steep turns and confined area operations.
During the flight, while over a marshland area, the helicopter suffered an in-flight breakup. The aircraft struck the ground roughly 8.5 nautical miles northwest of Creston at an elevation of 2,100 feet. The impact caused the fuselage to fall into the Kootenay River, leaving a wreckage path spanning several hundred metres. The student pilot sustained fatal injuries, and the helicopter was destroyed. There was no fire following the crash.
The investigation
The investigation examined the aircraft's maintenance history, the pilot's training records, and the physical wreckage. The Robinson R44 Astro had been maintained according to all regulations, and no mechanical failures were identified as the primary cause. The student pilot was an experienced trainee with approximately 52 total flight hours, specifically focused on the R44.
Investigators analyzed the wreckage distribution and flight tracking data, which suggested the pilot was likely performing steep turns at the time of the accident. While the area is a known waterfowl refuge, the investigation focused on the aerodynamic forces that led to the structural failure. The lack of an onboard flight recorder prevented a precise reconstruction of the final flight control inputs.
Findings
- The primary cause of the accident was an undetermined flight manoeuvre that caused the main rotor blades to strike the tailboom.
- This rotor strike severed the tailboom, tail rotor assembly, and driveshaft, leading to an immediate and catastrophic loss of control.
- The investigation noted that the pilot may have been attempting to avoid birds in the area, which could have triggered the excessive rotor flapping and mast bumping.
- The aircraft's center of gravity was likely near the aft limit of the envelope during the accident.
- The investigation highlighted a risk for Canadian pilots of the R22 and R44 models, noting that without specific training similar to the United States' SFAR 73, pilots may be vulnerable to inadvertent in-flight upsets caused by low-g manoeuvres or mast bumping.