As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE DESIGN OF THE FUEL SERVICE PANEL AND DOOR DOES NOT PREVENT WATER FROM ENTERING THE DOOR AND COLLECTING AT THE BOTTOM OF THE PANEL. THERE IS NO DRAIN HOLE. THIS IS A POTENTIAL CORROSION PROBLEM. THREE MODEL 60'S WERE LOOKED AT. ALL THREE ARE THE SAME DESIGN.