---
kind: "section"
citation: "14 C.F.R. § 23.2325"
title: "14"
number: "23.2325"
heading: "Fire protection."
url: "https://uscodex.org/cfr/14/23.2325"
---

# §23.2325. Fire protection.

- (a) The following materials must be self-extinguishing—
  - (1) Insulation on electrical wire and electrical cable;
  - (2) For levels 1, 2, and 3 airplanes, materials in the baggage and cargo compartments inaccessible in flight; and
  - (3) **For level 4 airplanes, materials in the cockpit, cabin, baggage, and cargo compartments.**
- (b) The following materials must be flame resistant—
  - (1) For levels 1, 2 and 3 airplanes, materials in each compartment accessible in flight; and
  - (2) Any equipment associated with any electrical cable installation and that would overheat in the event of circuit overload or fault.
- (c) Thermal/acoustic materials in the fuselage, if installed, must not be a flame propagation hazard.
- (d) Sources of heat within each baggage and cargo compartment that are capable of igniting adjacent objects must be shielded and insulated to prevent such ignition.
- (e) **For level 4 airplanes, each baggage and cargo compartment must—**
  - (1) Be located where a fire would be visible to the pilots, or equipped with a fire detection system and warning system; and
  - (2) Be accessible for the manual extinguishing of a fire, have a built-in fire extinguishing system, or be constructed and sealed to contain any fire within the compartment.
- (f) There must be a means to extinguish any fire in the cabin such that—
  - (1) The pilot, while seated, can easily access the fire extinguishing means; and
  - (2) For levels 3 and 4 airplanes, passengers have a fire extinguishing means available within the passenger compartment.
- (g) **Each area where flammable fluids or vapors might escape by leakage of a fluid system must—**
  - (1) Be defined; and
  - (2) Have a means to minimize the probability of fluid and vapor ignition, and the resultant hazard, if ignition occurs.
- (h) Combustion heater installations must be protected from uncontained fire.

## Notes

### Authority

Authority: 49 U.S.C. 106(f), 106(g), 40113, 44701-44702, 44704, Pub. L. 113-53, 127 Stat. 584 (49 U.S.C. 44704) note.

### Source

Source: Doc. No. FAA-2015-1621, Amdt. 23-64, 81 FR 96689, Dec. 30, 2016, unless otherwise noted.