Appendix B
• 43.13-1 Acceptable Methods, Techniques and Practices—Aircraft Inspection and Repair
• 43-204 Visual Inspection For Aircraft
• 43-206 Inspection, Prevention, Control, and Repair of Corrosion on Avionics Equipment
• 65-15 Airframe & Powerplant Mechanics Airframe Handbook [Chapter 11, Aircraft Electrical Systems]
c. Reports. You can download an electronic copy of the following reports from the “Final Reports” section of the Aging Transport Systems Rulemaking Advisory Committee (ATSRAC) website: www.mitrecaasd.org/atsrac.
• “Aging Systems Task Force, Aging Transport Systems, Task 1 and Task 2 Final Report,” dated August 1, 2000.
• “Aging Transport Systems Rulemaking Advisory Committee, Task 3 Final Report,” dated March 26, 2001.
• “Final Report ATSRAC Task Group 4,” dated September 28, 2000.
• “Final Report, ATSRAC HWG Task 7, Electrical Standard Wire Practices Manual (ESWPM),” dated October 31, 2002.
• “Transport Aircraft Intrusive Inspection Project (An Analysis Of The Wire Installations Of Six Decommissioned Aircraft), Final Report,” The Intrusive Inspection Working Group, dated December 29, 2000.
d. Other Documents.
• Air Transport Association (ATA) Specification 117 (Wiring Maintenance/Practices/Guidelines). You can download an electronic copy of this ATA document from http://www.airlines.org/.
• FAA Policy Statement No. PS-ANM100-2000-00105 (also numbered ANM- 01-04). System Wiring Policy for Certification of Part 25 Airplanes, issued June 25, 2001. You can download an electronic copy of this policy memorandum from the FAA Internet at http://rgl.faa.gov.
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Appendix C
APPENDIX C
Following are the discussions of Appendix H 25.5 published in the Federal Register on October 6, 2005 (70 FR 58508), in Notice of Proposed Rulemaking No 05-08, Enhanced Airworthiness Program for Airplane Systems/Fuel Tank Safety (EAPAS/FTS), at the time this rule was proposed.
pg. 58532-34
Appendix H to Part 25 – Instructions for Continued Airworthiness
The proposed Appendix H 25.5 would also require that the following information be included in ICA applicable to EWIS:
• Standard wiring practices data.
• Wire separation design guidelines.
• Information to explain the airplane’s EWIS identification method required by the proposed § 25.1711.
• Electrical load data and instructions for updating that data. Such information will help ensure that those modifying, repairing, or installing new EWIS will not perform any action that will adversely affect previously certified systems and unintentionally introduce potential hazards.
Standard wiring practices are defined as standards developed by the specific airplane manufacturer or industry-wide standards for the repair and maintenance of EWIS. They include procedures and practices for the installation, repair, and removal of EWIS components, including information about wire splices, methods of bundle attachment, connectors and electrical terminal connections, bonding, and grounding. Although a standard wiring practices manual is not a design manual, and those designing a new EWIS modification for a specific model airplane should not use it as such, it does provide the designer with insight into the types of EWIS components used by the TC holder and the procedures recommended by the manufacturer for maintenance or repair that supports continued airworthiness of the components.
pg. 58540
Paperwork Reduction Act Required information, use, and respondents
(6) The proposed revision to part 25 Appendix H would require that future manufacturers include acceptable EWIS practices in their ICA, presented in C-1
Appendix C
a standard format. This information would be used by maintenance personnel for wiring maintenance and repairs. The requirement is necessary because information about cautionary tasks during maintenance that can prevent situations that could compromise safety need to be available to maintenance personnel.
Standard wiring practices manuals, in which this information is presented, often differ from manufacturer to manufacturer and so are difficult for maintenance personnel to find specific information in. The requirement for a standard format is meant to correct this. Because of this proposal, manufacturers would change their Standard Wiring Practices Manuals (SWPM).
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