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MIL-HDBK-525 EWIS overview: Task 6 — Action plan, Part II

Michael Traskos
This is a series on MIL-HDBK-525 EWIS overview.  The eighth article in the series Electrical Wire Interconnection Systems (EWIS) Service Life Extension Programs (SLEPs), discusses the Enhanced Zonal Analysis Procedures (EZAP) process, which aims to improve maintenance and inspection programs for all EWIS components. The EZAP process tailors the frequency of inspections based on the […] Read more

MIL-HDBK-525 EWIS overview: Task 6 — Action plan, Part I

Michael Traskos
This is a series on MIL-HDBK-525 EWIS Overview. The seventh article in the series on Electrical Wire Interconnection Systems (EWIS) Service Life Extension Programs (SLEPs) develops an action plan and mitigation techniques based on the EWIS risk assessment (Task 5). If you missed any of the articles, here are the links to the previous ones: […] Read more

F-22 crash and aircraft electrical arcing

Michael Traskos
In a report that was released August 2013 by the USAF, the results of a Lockheed Martin F-22 aircraft crash point to a chaffed power feeder cable as the likely cause of failure. On November 15, 2012, the F-22, attempting to return to base, crashed just short of a runway in Florida. The crash resulted […] Read more

MIL-HDBK-525 EWIS overview: Task 5 — Risk assessment

Michael Traskos
We are presenting an EWIS overview.  This is the sixth article in the series on Electrical Wire Interconnection System (EWIS) Service Life Extension Programs (SLEPs).  If you missed one, here are the links to be previous articles: MIL-HDBK-525 Overview MIL-HDBK-525 Overview – Task 1: EWIS Documentation MIL-HDBK-525 Overview – Task 2: Data Analysis MIL-HDBK-525 Overview […] Read more

MIL-HDBK-525 EWIS overview: Task 4 — Component assessment

Michael Traskos
This is a series that will give you a good EWIS overview.  This article is the fifth in the series devoted to reviewing the guidance provided in MIL-HDBK-525 for Electrical Wire Interconnection System (EWIS) Service Life Extension Programs (SLEPs). If you missed one, here are the links to be previous articles: MIL-HDBK-525 Overview MIL-HDBK-525 Overview […] Read more

MIL-HDBK-525 EWIS overview: Task 3 — EWIS assessment

Carina Cannon
This is a series that will give you an EWIS overview.  This article is the fourth in the series devoted to reviewing the guidance provided in MIL-HDBK-525 for Electrical Wire Interconnection System (EWIS) Service Life Extension Programs (SLEPs). If you missed one, here are the links to be previous articles: MIL-HDBK-525 Overview MIL-HDBK-525 Overview – […] Read more

MIL-HDBK-525 EWIS overview: Task 2 — Task analysis for EWIS

Carina Cannon
In order to get a better understanding of wire degradation,  this is a good view of task analysis for EWIS.  This article discusses the second task “Data Analysis” in the series on EWIS Service Life Extension Program (SLEP). This is based on the new guidance developed by the USAF for the sustainment of aging aircraft […] Read more

MIL-HDBK-525 EWIS overview: Task 1 — EWIS documentation

Michael Traskos
This series on EWIS Service Life Extension Program (SLEP) risk assessment techniques discusses the implications and ideas contained in the EWIS handbook MIL-HDBK-525; an overview of the handbook objectives was covered in the MIL-HDBK-525 Overview for Service Life Extension article. Each article in this series will review a task or a subtask within the EWIS […] Read more

MIL-HDBK-525 overview for service life extension

Michael Traskos
The newly published Electrical Wiring Interconnect System (EWIS) Integrity Program Handbook (MIL-HDBK-525) provides a comprehensive method for assessing an aircraft’s EWIS condition for service life extension and ensuring continued airworthiness. There has not been a consistent method by which maintainers have determined the EWIS system health of their platforms, leaving each group to develop their […] Read more

In aircraft wire systems, how much slack should I give a wire?

Michael Traskos
Clearly wires shouldn’t be pulled so tight that they are under constant regular strain, but is there some guidance as to how much slack should be provided in aircraft wire systems? One source for guidance comes from the FAA in AC 25.1701. In this advisory circular, the guidance suggests that “EWIS components should have sufficient […] Read more