NTSB Probable Cause

FUEL EXHAUSTION DUE TO THE PILOTS INADEQUATE PREFLIGHT PLANNING AND HIS FAILURE TO REFUEL THE AIRPLANE PRIOR TO DEPARTURE. FACTORS IN THE ACCIDENT WERE: 1) THE UNRELIABLE FUEL SIGHT GAUGES WHICH WERE CONTAMINATED WITH A TAR LIKE RESIDUE WHICH MAY HAVE PROVIDED AN ERRONEOUS INDICATION OF FUEL IN THE SYSTEM, 2) INADEQUATE AIRPLANE MAINTENANCE, AND, 3) THE UNSUITABLE TREE COVERED NATURE OF THE TERRAIN WHERE THE FORCED LANDING WAS ATTEMPTED.