§29.1185 Flammable fluids

(a) No tank or reservoir that is part of a system containing flammable fl uids or gases m ay be i n a desi gnated fi re zone unl ess the fluid contained, t he desi gn of t he system, the materials used i n t he t ank and i ts supports, the shutoff means, and t he connect ions, l ines, and controls provide a degree of safet y equal to that which would exi st i f t he t ank or reservoi r were outside such a zone. (b) Each fuel tank must be isolated from the engines by a firewall or shroud. (c) There must be at least 13 mm (½ inch) of clear airspace between each tank or reservoir and each firewall or shroud isol ating a designated fire zone, unless equivalent means are used t o prevent heat transfer from the fire zone to the flam mable fluid. (d) Absorbent m aterial close to flam mable fluid sy stem com ponents t hat m ight leak must be covered or t reated t o prevent the absorption of hazardous quantities of fluids.