Aircraft Wire and Cable Application and Developments

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• published: 23 Jul 2015
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The real title of this is “What’s hot and what’s not in aerospace wire and cable.” However, aircract wiring engineers have an aversion to anything that is “hot,” except coffee. Visit http://www.lectomec.com for a free newsletter for aerospace engineers. Because of this reluctance, we have titled this video “Aircraft Wire and Cable Developments.” This video is a short summary of remarks made by Lectromec’s president Michael Traskos at a recent trade conference in China. He delves into the future for aerospace wire and cable, wire system assessment and degradation, and other topics. Also included are new aerospace wire and cable requirements, certification, and trends. https://www.youtube.com/watch?v=SA1nnBfZs0s = = For more Lectromec videos: = = EWIS – Aircrqaft Wire Testing and Combat Vulnerability – 12 minutes When it comes to aerospace wire testing, we normally think of abrasion resistance, heat shock, and other concepts that are generally considered when we look at the “airworthiness” of aerospace wires. This vintage video was recorded in the mid-1980s, and takes a look at wire survivability in a combat situation. This video shows what happens when bullets hit aerospace wiring systems and the dangers of resetting circuit breakers. It is among the first videos that were created documenting the potential hazards of electrical arcing. = = Wet Arc Track Resistance Testing for Aircraft Wiring – 4 minutes Chafing and rough maintenance can produce abrasion on aerospace wiring. Combined with moisture it can produce an arcing event. This video shows what happens when this dangerous combination occurs. Essentially, a saline solution is dropped on intentionally damaged wires. This short time-lapse video is an example of Wet Arc Track Resistance Testing. https://www.youtube.com/watch?v=oMWqvlU8 EWIS - Electrical Wire Risk Assessment - Part Two – 8 minutes This is the second part of the two part series explaining the Lectromec software tool that facilitates compliance to the Electronic Wire Interconnect Systems (EWIS) regulations needed to obtain FAA certification. This video details some of the reports that the EWIS Risk Assessment Tool (RAT) can provide. These include information on wire bundles, collocation, and a Failure Modes and Effects Analysis. It not only analyzes physical wire failures, but also the functional failure impact. In addition, it offers mitigation suggestions. https://www.youtube.com/watch?v=m4NTnTpGmhQ = = EWIS - Electrical Wire Risk Assessment - Part One – 10 minutes {KEYWORD=Electrical Wire Risk Assessment} After decades in the aircraft wire testing business, Lectromec has developed a software tool that helps facilitate the EWIS certification resulting from FAA regulations. This is the first of a two part series explaining the software tool. The video particularly focuses on regulation 25.1709 and discusses the means by which the EWIS Risk Assessment Tool (EWIS RAT) is able to result in certification. https://www.youtube.com/watch?v=KKrQfm-xNXY = = Aerospace Wire Arc Resistance Testing – 14 minutes Lectromec has been involved in aerospace wire arc resistance testing for decades. This vintage video is originally from the late 199and was put together at the request of the National Transportation Safety Board. Technicians took wire insulation from a Boeing 747 and showed what can happen if subjected to liquids. A plane such as a 747 can have a wide range of liquids that can accidentally come in contact with wiring. Examples of liquids include cleaners, lavatory water, spilled beverages, and even condensation. The test in this video shows nicks in insulation and the impact of moisture. The damaged wire represents environmental aging or trauma to the aerospace electrical system. https://www.youtube.com/watch?v=gGx76nVxF-4 = = A Brief Review of MIL-HDBK-525 – 14 minutes In an attempt to reinforce the information provided in MIL-HDBK-525, Lectromec put together a series of articles explaining it. These articles have proven to be some of the most popular blogs Lectromec has written. If you would prefer a video “assist” in understanding the handbook, take a look at this video. It is a terrific breakdown of the seven enumerated tasks of MIL-HDBK-525, including 1. Data Analysis, 2. Maintenance Data, 3. Inspection, 4. Laboratory evaluation, 5. EWIS risk assessment, 6. Mitigation, and 7. Reassessment. https://www.youtube.com/watch?v=2mE8haIIZak