CS 23.2325 Fire protection

Normal-Category Aeroplanes (CS-23) · CS-23 · EAR revision 13 May 2026

IRImplementing rule

CS 23.2325Fire protection

(a)The aeroplane is designed to minimise the risk of fire initiation due to:

(1)anticipated heat or energy dissipation or system failures or overheat that are expected to generate heat sufficient to ignite a fire;

(2)ignition of flammable fluids, gases or vapours; and

(3)fire-propagating or -initiating system characteristics (e.g. oxygen systems).

(b)The aeroplane is designed to minimise the risk of fire propagation by:

(1)providing adequate fire or smoke awareness and extinguishing means when practical;

(2)application of self-extinguishing, flame-resistant, or fireproof materials that are adequate to the application, location and certification level; or

(3)specifying and designing designated fire zones that meet the specifications of CS 23.2330.

IR · CS 23.2325 — CS-23 · ED Decision 2017/013/R · CS-23 Easy Access Rules · EAR revision 13 May 2026

AMCAcceptable means of compliance

AMC1 23.2325Fire protection

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ASTM F44 F3264 Standard Specification for Normal Category Aeroplanes Certification

7.6 Fire Protection F3061/F3061M-24a Standard Specification for Systems and Equipment in Small Aircraft F3231/F3231M-24 Standard Specification for Electrical Systems for Aircraft with Combustion Engine Electrical Power Generation F3234/F3234M-21 Standard Specification for Exterior Lighting in Small Aircraft F3066/F3066M-18 Standard Specification for Aircraft Powerplant Installation Hazard Mitigation F3083/F3083M-20a Standard Specification for Emergency Conditions, Occupant Safety and Accommodations F3408/F3408M-21 Standard Specification for Aircraft Emergency Parachute Recovery Systems

Remarks ASTM F44 published standards for showing compliance for electrical systems that are installed on aeroplanes with electric or hybrid-electric propulsion systems. EASA has not yet accepted F3316-19; however, EASA would take into consideration applications from applicants that use this standard as the basis for the development of their means of compliance subject to agreement with EASA. [AMC & GM to CS-23: Issue 4] [AMC & GM to CS-23: Issue 5]

AMC · AMC1 23.2325 — CS-23 · ED Decision 2026/003/R · CS-23 Easy Access Rules · EAR revision 13 May 2026

AMCAcceptable means of compliance

AMC2 23.2325Fire protection

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CS-23 Amdt 4

23.1453 Protection of oxygen equipment from rupture

23.851 Fire extinguishers

23.853 Passenger and crew compartment interiors (With Appendix F)

23.855 Cargo and baggage compartment fire protection (With Appendix F)

23.859(a) Combustion heater fire protection

23.863 Flammable Fluid Fire Protection

23.1337(a) Powerplant instruments installation

23.1351 Electrical system: General

23.1359(a), (c) Electrical System fire protection

23.1383(d) Taxi and landing lights (With Appendix F)

23.1385(d) Position light system installation

AMC · AMC2 23.2325 — CS-23 · ED Decision 2017/025/R · CS-23 Easy Access Rules · EAR revision 13 May 2026

AMCAcceptable means of compliance

AMC3 23.2325Fire protection

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CS VLA Amdt 1 VLA.853 Passenger and crew compartment interiors (With Appendix F) VLA.857 Electrical bonding VLA.863 Flammable Fluid Fire Protection VLA.1337 Powerplant instruments installation VLA.1351 Electrical system: General VLA.1384 External lights

AMC · AMC3 23.2325 — CS-23 · ED Decision 2017/025/R · CS-23 Easy Access Rules · EAR revision 13 May 2026

All rules in SUBPART D — DESIGN AND CONSTRUCTION

Consolidated from the EASA Easy Access Rules (revision 13 May 2026, extracted 17 Aug 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.

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