Incident Details
A flight instructor was providing instruction to an airplane owner seeking to qualify as pilot-in-command. After approximately one hour of flight, an owner-devised fuel tank change alarm sounded. The instructor believed the owner had switched the fuel tanks.
As the airplane entered the base leg for landing, with the instructor at the controls, the engine stopped. The instructor selected an alternate fuel tank, but the engine would not restart. The airplane subsequently landed with the landing gear retracted near the runway.
Post-Accident Investigation
An on-scene investigation revealed that the main fuel tanks were empty. The flight had commenced with the left main tank empty and the right main tank full. At the time of the accident, the fuel tank selector was positioned on the left main tank. The auxiliary fuel tanks were full.
Pre-Flight Activities
The instructor stated that he provided the owner with 6 to 10 minutes of ground instruction regarding the flight maneuvers to be performed. He did not observe the owner's preflight inspection.