What was found
(CAN) DURING A 100 HR INSPECTION, WHITE PARTICULATE WAS FOUND IN FUEL STRAINER AND RIGHT FUEL SIGHT GAUGE. WHEN SUMP DRAIN WAS REMOVED, A LARGE AMOUNT OF WHITE FILM FLOWED OUT WITH THE FUEL. UPON FURTHER INSPECTION OF THE TANK INTERIOR, IT WAS COATED WITH A WHITE FILM WHICH WAS NOW PEALING OFF. THE LEFT TANK WAS IN A SIMILAR STATE. FOUND 'GUN WASH' HELPED SOFTEN THE MATERIAL FOR REMOVAL. STEAM CLEANING WAS NOT EFFECTIVE.