Incident Overview
According to the pilot, during the approach to the landing airport, the pilot missed the tower's call for landing clearance because of radio traffic congestion. The pilot's attempts to confirm clearance were continually blocked by other transmissions. The pilot completed all before-landing checklist items except the landing gear. After finally obtaining landing clearance on short final approach, the pilot forgot to lower the landing gear, resulting in a wheels-up landing.
Postcrash Examination
A postcrash examination of the wheels-up warning circuit revealed that the warning horn was operable, indicating that the warning system was functional at the time of the accident.
Probable Cause
The probable cause, based on the pilot's account, is that the pilot failed to lower the landing gear due to distraction caused by radio communication congestion, which led to missing the landing clearance and subsequent oversight of the landing gear extension.