As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE ORIGINAL FLUSH FUEL CAPS AND PLATES WERE REPLACED SEVERAL YEARS AGO WITH 'UMBRELLA' CAPS AND PLATES SOLD BY CESSNA. THE CAPS WERE RED PLASTIC. DURING A FLIGHT IN FEBRUARY OF THIS YEAR, APPROXIMATELY 6 GALLONS OF GAS SIPHONED OUT OF LEFT TANK. DURATION OF THE FLIGHT WAS 5.50 HOURS. SENDING THE ASSY FOR EXAMINATION.