§ 183.552. Plastic encased fuel tanks: Installation.
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/us/cfr/t33/s§ 183.552·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
(a)Each fuel tank encased in cellular plastic foam or in fiber reinforced plastic must have the connections, fittings, and labels accessible for inspection and maintenance.
(b)If a metallic fuel tank is encased in cellular plastic or in fiber reinforced plastic, water must not collect between the plastic and the surface of the tank or be held against the tank by capillary action.
(c)If the plastic is bonded to the surface of a metallic fuel tank, the adhesive strength of the metal to the plastic bond must exceed the cohesive strength of the plastic.