AMC 25.1719 Accessibility provisions: EWIS

• ED Decision 2008/006/R found in: CS-25 Amdt 27 - Large Aeroplanes (Jan 2023)

AMC 25.1719 Accessibility provisions: EWIS ED Decision 2008/006/R [CS 25.1719](#_DxCrossRefBm1709821082) requires that means be provided to allow for inspection of EWIS and replacement of their components as necessary for continued airworthiness. 1 The intent of [CS 25.1719](#_DxCrossRefBm1709821082) is to ensure that EWIS components are installed so that inspections, tests, repairs, and replacements can be undertaken with a minimum of aircraft disassembly. When adjacent structures and aircraft systems components must be removed to allow access to wire installations, new possibilities for contamination, chafing, and other types of damage are introduced. 2 As far as practicable, EWIS components should be installed so that inspections, tests, repair, and replacements can be done without undue disturbance to the EWIS installation or to surrounding aircraft systems. During the design phase, consider minimizing the amount of aircraft disassembly required to perform such tasks. For example, wiring inside conduit may incur damage from chafing against the sides of the conduit. If failure of wiring inside a conduit can lead to an unsafe condition, a means should be provided for inspection of those wires. Inspection may be by testing or other means acceptable to the Agency and should be included in the maintenance requirements that are part of the Instructions for Continued Airworthiness. [Amdt 25/5]