What happened
Operating under VFR conditions, the pilot completed a visual approach to Runway 06. During the landing sequence, the pilot reported that the aircraft ballooned prior to final touchdown and noted that the landing was somewhat bumpy, though not characterized as a hard landing.
Immediately following the final touchdown, the right main landing gear collapsed. This structural failure caused the aircraft to veer off the side of the runway.
The investigation
An examination of the landing gear identified a fracture located in the web area of the trunnion. Investigators noted that an existing Airworthiness Directive and a manufacturer service bulletin had previously mandated inspections of this specific web area for cracks to prevent main landing gear collapse and subsequent aircraft damage.
A detailed metallurgical examination was performed on the landing gear components. This analysis determined that the fractures were the result of overstress and confirmed that no pre-existing fractures were present in the component prior to the event.