A gradual release of Avioverse begins in October 2026. Request early access →
Large Aeroplanes (CS-25) · CS-25 · EAR revision 26 Jan 2023
IRImplementing rule
(See AMC 25.1723) EWIS components must be considered to be a potential ignition source in each area where flammable fluid or vapours might escape by leakage of a fluid system and must meet the requirements of CS 25.863.
[Amdt 25/5]
IR · CS 25.1723 — CS-25 · ED Decision 2008/006/R · CS-25 Easy Access Rules · EAR revision 26 Jan 2023
AMCAcceptable means of compliance
CS 25.1723 requires that EWIS located in areas where flammable fluid or vapours might escape must be considered to be a potential ignition source. As a result, these EWIS components must meet the requirements of CS 25.863. CS 25.863 requires that efforts be made to minimise the probability of ignition of fluids and vapours, and the hazards if ignition does occur. See CS 25.1707 for the separation requirements between EWIS and flammable fluids. EWIS components located in fuel vapour zones should be qualified as explosion proof, where appropriate, in accordance with Section 9 of EUROCAE ED-14 / RTCA Document DO-160 or other equivalent approved industry standard. The possibility of contamination with flammable fluids due to spillage during maintenance action should also be considered.
[Amdt 25/5]
AMC · AMC 25.1723 — CS-25 · ED Decision 2008/006/R · CS-25 Easy Access Rules · EAR revision 26 Jan 2023
All rules in SUBPART H – ELECTRICAL WIRING INTERCONNECTION SYSTEMS
Consolidated from the EASA Easy Access Rules (revision 26 Jan 2023, 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.
Metis opens with Avioverse in October 2026 · request early access.