Text in force at CS23-6: from CS23-5, effective 15 Aug 2017.
(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.
ED Decision 2017/013/R · Source