NTSB Probable Cause

FAILURE OF THE PILOT TO EXTEND THE LANDING GEAR, WHICH RESULTED IN A WHEELS UP LANDING; HIS IMPROPER DECISION TO ATTEMPT A GO AROUND (ABORTED LANDING) AFTER THE AIRPLANE CONTACTED THE RUNWAY; AND HIS FAILURE TO ATTAIN OR MAINTAIN ADEQUATE AIRSPEED WHILE ATTEMPTING TO CLIMB AFTER LIFTOFF.