14 C.F.R. § 23.1182 Nacelle areas behind firewalls.
Title 14 - Aeronautics and Space
Components, lines, and fittings, except those subject to the provisions of §23.1351(e), located behind the engine-compartment firewall must be constructed of such materials and located at such distances from the firewall that they will not suffer damage sufficient to endanger the airplane if a portion of the engine side of the firewall is subjected to a flame temperature of not less than 2000 °F for 15 minutes. [Amdt. 23–14, 38 FR 31816, Nov. 19, 1973]
Title 14: Aeronautics and Space
PART 23—AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY AIRPLANES
Subpart E—Powerplant
Powerplant Fire Protection
§ 23.1182 Nacelle areas behind firewalls.
