What happened
On 2 July 2009, a Skystar Kitfox MK5, registration G-LESZ, was performing a private flight near Swanborough Farm, East Sussex. Following a routine approach and touchdown, the pilot found the aircraft drifting uncontrollably to the left. Despite applying maximum right rudder and heavy right braking, the aircraft continued its lateral movement. The pilot briefly considered cutting the engine power to stop the drift, but opted against it to avoid the risk of the throttle inadvertently snapping to full power. The aircraft eventually struck a dense hawthorn hedge and barbed wire fence at an oblique angle. The impact caused the nose to bury into the hedge before the aircraft slid backward. The pilot, who suffered only whiplash, was able to exit the aircraft without assistance, and no fire occurred.
The investigation
The investigation focused on the cause of the uncontrolled leftward drift. Examination of the aircraft's tracks showed a clear divergence toward the left. While the pilot could not immediately explain why the tailwheel was offset, photographic evidence from the takeoff and approach phases indicated that the tailwheel was already positioned to the left from the moment the aircraft became airborne.
Post-accident inspections and discussions with the Light Aircraft Association (LAA) identified a potential mechanical failure in the tailwheel assembly. It was determined that the disconnect links in the tailwheel operating horn could become displaced, which would shorten the effective length of the control linkage. This displacement would create a spring-biased effect, forcing the tailwheel to an offset position even when the rudder was in the neutral position.
Findings
- The aircraft sustained significant damage, including broken propeller, distorted cockpit tubing, and damage to the wings, fuselage, and tail surfaces.
- The tailwheel control was likely biased to the left due to a displaced link in the operating horn.
- It is possible that a force applied during takeoff caused the tailwheel to disengage from its detent and remain in an offset position throughout the flight.