14 C.F.R. § 25.1185 Flammable fluids.
Title 14 - Aeronautics and Space
(a) Except for the integral oil sumps specified in §25.1183(a), no tank or reservoir that is a part of a system containing flammable fluids or gases may be in a designated fire zone unless the fluid contained, the design of the system, the materials used in the tank, the shut-off means, and all connections, lines, and control provide a degree of safety equal to that which would exist if the tank or reservoir were outside such a zone. (b) There must be at least one-half inch of clear airspace between each tank or reservoir and each firewall or shroud isolating a designated fire zone. (c) Absorbent materials close to flammable fluid system components that might leak must be covered or treated to prevent the absorption of hazardous quantities of fluids. [Doc. No. 5066, 29 FR 18291, Dec. 24, 1964 as amended by Amdt. 25–19, 33 FR 15410, Oct. 17, 1968; Amdt. 25–94, 63 FR 8848, Feb. 23, 1998]
Title 14: Aeronautics and Space
PART 25—AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES
Subpart E—Powerplant
Powerplant Fire Protection
§ 25.1185 Flammable fluids.
