11/14/07 AC 25-26
(8) Materials used to provide additional protection for wires, including wire
insulation, wire sleeving, and conduits that have electrical termination for the
purpose of bonding.
(9) Shields or braids.
(10) Clamps and other devices used to route and support the wire bundle.
(11) Cable tie devices.
(12) Labels or other means of identification.
(13) Pressure seals.
(14) EWIS components inside shelves, panels, racks, junction boxes, distribution
panels, and back-planes of equipment racks, including, but not limited to, circuit
board back-planes, wire integration units, and external wiring of equipment.
(b) Except for the equipment indicated in paragraph (a)(14) of this section, EWIS
components inside the following equipment, and the external connectors that are
part of that equipment, are excluded from the definition in paragraph (a) of this
section:
(1) Electrical equipment or avionics that are qualified to environmental
conditions and testing procedures when those conditions and procedures are—
(i) appropriate for the intended function and operating environment, and
(ii) acceptable to the FAA.
(2) Portable electrical devices that are not part of the type design of the airplane.
This includes personal entertainment devices and laptop computers.
(3) Fiber optics.
Environmentally Sealed Splice − A wire splice that ensures that moisture or fluid will not
penetrate the spliced area.
Legacy Document − An organization’s standard wiring practices manual existing prior to the
adoption of the requirements of H25.5(a)(2) of Appendix H to 14 CFR part 25.
Master Breakdown Index (MBI) − An index developed to supplement a legacy document.
An MBI provides a means of finding information without the need for reformatting the legacy
SWPM. An example of an MBI is presented at the end of paragraph 8 of this AC.
Separation/Segregation – Either a physical distance between wiring and adjacent structure,
systems or wiring, or a barrier that provides at least the equivalent of the protection of the
applicable physical distance.
Standard Practices – Information detailing procedures and practices for the universal repair
and maintenance of electrical wire, cable bundles, and coaxial cables. Standard practices include
procedures and practices for the inspection, installation, and removal of electrical systems
components or other EWIS components including methods of bundle attachment, wire splices,
connectors and electrical terminal connections, and bonding/grounding.
6. STANDARDIZED SWPM ORGANIZATION. A table outlining the standard
organizational format of an SWPM and the sequence of major topics that should be included is
contained in Appendix A of this AC.
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