Background
According to the pilot's report, there was a preexisting issue with the right main landing gear down indication light. An adjustment to the associated switch was performed, and two days later, the pilot departed for a flying vacation. Throughout the month-long trip, no discrepancies were noted with the aircraft's landing gear system.
Sequence of Events
On the return flight, during an intermediate stop prior to the intended destination, the right main landing gear down indication light did not illuminate after gear extension. The pilot recycled the landing gear, but the indicator remained off. The pilot continued the landing and reported no discrepancies. The aircraft then proceeded to the accident airport.
Landing and Gear Collapse
Before landing at the accident airport, the pilot extended the landing gear but did not receive a gear down indication from the right main landing gear. The gear was recycled, yet the right main landing gear down light still failed to illuminate. The pilot proceeded with the landing. During the landing rollout, the right main landing gear collapsed.