What happened
On 27 September 2024, a Guim/bal Cabri G2, registration G-FICH, was conducting a training flight at Leicester Airport. The flight was an instructional session involving a student and a commander, intended as a refresher for the student. During a period of hovering practice, the aircraft began to yaw to the left while moving forward at a very low speed.
The rotation accelerated quickly, with the helicopter completing four full turns before striking the ground. The impact caused significant damage, including destroyed rotor blades and a separated tail boom. While the student sustained minor injuries, the commander initially reported no injuries, though he later passed away due to an unrelated medical condition.
The investigation
Investigators examined the aircraft and found no mechanical or technical failures that contributed to the loss of control. The engine and fuel systems were found to be in good condition. While the tail rotor driveshaft was bent during the impact, the pedals were capable of full travel.
Analysis focused on the pilot's response and the aircraft's configuration. The investigation noted that the commander, who had significant experience on the type, was accustomed to flying with adjustable pedals. In the left seat of G-FICH, however, the pedals were the standard non-adjustable version. The investigation also reviewed CCTV footage, which confirmed the rapid increase in rotation rate and the aircraft's descent during the final turns.
Findings
- The primary cause of the accident was likely that full opposite pedal was not applied or held long enough to arrest the leftward yaw.
- The commander's familiarity with adjustable pedals may have led to an insufficient or delayed application of the required pedal input.
- The sudden onset of the yaw may have startled the pilot, and the rapid rotation rate likely caused disorientation.
- Environmental factors, such as the wind direction and a potential increase in collective pitch, may have exacerbated the yaw.