Accident Narrative
The pilot reported conducting a standard 'GUMPS' check on base leg and believed the landing gear was extended at that point. Another 'GUMPS' check was performed on final approach. During the flare, the pilot heard a warning horn but thought it was the stall warning horn, not the landing gear warning. The aircraft touched down normally, but after approximately two seconds, the nose dropped and the airplane began to slide along the runway.
Pilot Actions
The pilot stated that the flare was executed normally and the throttle was reduced to idle. Upon touchdown, the aircraft pitched forward and slid. No abnormal control inputs were noted. The pilot did not recognize the landing gear warning horn during the landing sequence.
Post-Accident Inspection
Approximately five minutes after the accident, the pilot returned to the airplane and observed the landing gear control handle positioned between the center and bottom detents. An operational check of the landing gear system was performed after the accident, and it functioned normally, indicating no mechanical malfunction.