SUBPART H – ELECTRICAL WIRING INTERCONNECTION SYSTEMS
Large Aeroplanes (CS-25) · CS-25 · CS 25.1701 – CS 25.1731
On this page
AMC 25 Subpart H Correlation with previous amendment of CS-25
The following table provides correlation between CS-25 Subpart H and CS-25 amendment 4:
CS 25.1701 Definition
(See AMC 25.1701) (a) Electrical wiring interconnection system (EWIS) means any wire, wiring device, or combination of these, including termination…
CS 25.1703 Function and Installation; EWIS
(See AMC 25.1703) (a) Each EWIS component installed in any area of the aeroplane must:
CS 25.1705 Systems and Functions; EWIS
EWIS associated with systems required for type certification or by operating rules must be considered an integral part of that system and must be…
CS 25.1707 System Separation; EWIS
(See AMC 25.1707) (a) Each EWIS must be designed and installed with adequate physical separation from other EWIS and aeroplane systems so that an EWIS…
CS 25.1709 System Safety; EWIS
(See AMC 25.1709) EWIS must be designed and installed so that:
CS 25.1711 Component identification; EWIS
(See AMC 25.1711) (a) EWIS components must be labelled or otherwise identified using a consistent method that facilitates identification of the EWIS…
CS 25.1713 Fire Protection; EWIS
(See AMC 25.1713) (a) All EWIS components must meet the applicable fire and smoke protection requirements of CS 25.831(c) and CS 25.863.
CS 25.1715 Electrical bonding and protection against static electricity; EWIS
(See AMC 25.1715) (a) EWIS components used for electrical bonding and protection against static electricity must meet the requirements of CS 25.899.
AMC 25.1715 Electrical bonding and protection against static electricity: EWIS
CS 25.1717 Circuit protective devices; EWIS
(See AMC 25.1717) EWIS components must be designed and installed so they are compatible with the circuit protection devices required by CS 25.1357, so…
CS 25.1719 Accessibility Provisions; EWIS
(See AMC 25.1719) Means must be provided to allow for inspection of EWIS and the replacement of its components as necessary for continued airworthiness.
CS 25.1721 Protection of EWIS
(See AMC 25.1721) (a) No cargo or baggage compartment may contain any EWIS whose damage or failure may affect safe operation, unless the EWIS is…
CS 25.1723 Flammable fluid protection; EWIS
(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…
CS 25.1725 Powerplants; EWIS
EWIS associated with any powerplant must be designed and installed so that the failure of an EWIS component will not prevent the continued safe operation…
CS 25.1727 Flammable Fluid Shutoff Means; EWIS
EWIS associated with each flammable fluid shutoff means and control must be fireproof or must be located and protected so that any fire in a fire zone…
CS 25.1729 Instructions for Continued Airworthiness; EWIS
The applicant must prepare Instructions for Continued Airworthiness applicable to EWIS in accordance with the requirements of CS 25.1529 and Appendix H…
CS 25.1731 Powerplant and APU fire detector system; EWIS
EWIS that are part of each fire or overheat detector system in a fire zone must be at least fire-resistant.
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.