Event
During approach to the destination airport, the pilot moved the landing gear selector to the down position. The gear did not initially extend. The pilot then reset the electric gear motor's circuit breaker, after which the gear extended. The pilot reported seeing the green landing gear position light illuminate, indicating that the gear was down and locked. The landing was normal, but seconds after touchdown, the landing gear collapsed.
Examination
An examination of the landing gear extension system revealed that the system functioned properly when manually extended. Due to impact damage sustained during the collapse, the gear system could not be electrically operated during the examination. The reason for the gear's failure to fully extend to the locked down position was not determined.