What happened
A pilot and flight instructor were conducting a VFR training flight, completing the departure and en route portions of the flight without incident. Upon entering the terminal area, air traffic control instructed the pilot to enter a right base for runway 24.
The pilot lowered the landing gear and confirmed its status using the verbal cues "three in the green" and "one in the mirror." The instructor verified the landing gear indicator showed the gear was down and locked. Following the completion of the prelanding checklist, the aircraft was cleared to land. During short final, the instructor called for mixture rich, propellers full forward, and confirmed the landing gear was down with "three green."
As the aircraft touched down, the right main landing gear collapsed, causing the airplane to veer to the right. The right wing subsequently struck a runway light, which led to the collapse of the nose gear. The aircraft came to a stop in an upright position, supported by the left main landing gear, which remained down and locked. Both the pilot and instructor were not injured.
The investigation
An examination of the right main landing gear revealed no malfunctions or failures occurring prior to the impact. Additionally, a witness observed that the nose wheel and both the left and right main landing gears were in the down position at the moment of touchdown.