Appendix A
STANDARDIZED ORGANIZATION FOR STANDARD WIRING PRACTICES MANUALS (SWPM) (Groups, Major Topics, Sequence, and Description of Minimum Content)
GROUP MAJOR TOPIC DESCRIPTION
SPECIFIC SYSTEM WIRING
SPECIFIC WIRING
ASSEMBLY For wiring that has a necessarily specific configuration (e.g., primary flight control, fuel quantity indicator system, etc.):
a. Applicable conditions for repair and replacement.
b. Disassembly, assembly, installation, assembly integrity testing.
AIRLINE
CUSTOMIZED DATA AIRLINE SPECIFIED Reserved for airline use.
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Appendix B
APPENDIX B
RELATED REGULATIONS AND DOCUMENTS
a. Regulations. You can download an electronic copy of 14 CFR from the Internet at http://www.gpoaccess.gov/cfr/. A paper copy can be ordered by sending a request to the U.S. Superintendent of Documents, U.S. Government Printing Office, Washington, D.C. 20402-0001, or by calling telephone number (202) 512-1800; or by sending a request by facsimile to (202) 512-2250.
Part 21 Certification Procedures for Products and Parts.
Part 25 Airworthiness Standards: Transport Category Airplanes.
Part 43 Maintenance, Preventive Maintenance, Rebuilding, and Alteration.
Part 91 General Operating and Flight Rules.
Part 121 Operating Requirements: Domestic, Flag, and Supplemental Operations.
Part 125 Certification and Operations: Airplanes Having a Seating Capacity of 20 or More Passengers or a Maximum Payload Capacity of 6,000 Pounds or More; and Rules Governing Persons on Board Such Aircraft.
Part 129 Operations: Foreign Air Carriers and Foreign Operators of U.S.- Registered Aircraft Engaged in Common Carriage.
Part 145 Repair Stations.
b. Advisory Circulars (AC). You can download an electronic copy of the latest version of the following ACs from the FAA Internet at http://rgl.faa.gov.
• 25-16 Electrical Fault and Fire Protection and Prevention
• 25.981-1 Fuel Tank Ignition Source Prevention Guidelines
• 25.1701-1 Certification of Electrical Wiring Interconnection Systems on Transport Category Airplanes
• 43-12 Preventive Maintenance B-1
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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