Incident Overview
A pilot reported that after activating the gear extension switch and visually confirming that the main landing gear was extended, the aircraft touched down smoothly. During the landing roll, the main landing gear collapsed, causing the airplane to veer off the runway and collide with a ditch.
Pilot Statement
According to the pilot, the touchdown was smooth and soft. However, as he applied the brakes, he felt the nose rising and his seat getting lower to the ground, indicating the collapse of the landing gear.
Postaccident Examination
A postaccident examination of the airplane revealed no evidence of preimpact mechanical malfunction. The landing gear was tested and cycled normally, suggesting that the collapse was not due to a mechanical failure before impact.
Conclusion
The exact cause of the landing gear collapse was not determined, as the examination found no preexisting mechanical issues. The incident highlights the sudden nature of the gear collapse despite a normal extension and smooth touchdown.