Accident Description
During an approach, the pilot reported that the landing gear extended and the aircraft experienced a corresponding decrease in airspeed. The pilot stated that upon lowering the gear, he observed a green gear-down indication and saw the shadow of the extended gear on the ground as the aircraft crossed the runway threshold. Witnesses on the ground reported that the gear appeared to be in the normal position for landing.
Landing Gear Collapse
During the landing roll, the landing gear collapsed. The aircraft came to a stop on the runway. Three different aircraft maintenance personnel examined the aircraft after the incident. Their inspections found no reason for the gear retraction. The exact cause of the collapse was not determined by the maintenance personnel.
Post-Accident Examination
A detailed examination of the landing gear system was conducted by multiple maintenance technicians. All reported finding no mechanical or hydraulic issues that could explain the gear collapse. The gear had appeared to be fully extended and locked prior to the landing, based on the pilot's observation and witness accounts.