View Latest Blog Entries
Testing & Assessment Certification Standard & Regulation Aging Wires & Systems Maintenance & Sustainment Management Conference & Report Protection & Prevention Research Miscellaneous Arcing
Popular Tags
Visual Inspection High Voltage AS50881 MIL-HDBK MIL-HDBK-525 FAR AS4373 Maintenance Electromagnetic Interference (EMI) FAR 25.1707 Wire System Arcing Damage
All Tags in Alphabetical Order
2021 25.1701 25.1703 abrasion AC 33.4-3 AC 43 Accelerated Aging accessibility ADMT Aging Systems AIR6808 AIR7502 Aircraft Power System aircraft safety Aircraft Service Life Extension Program (SLEP) altitude arc damage Arc Damage Modeling Tool Arc Fault (AF) Arc Fault Circuit Breaker (AFCB) Arc Track Resistance Arcing Arcing Damage AS22759 AS22759/87 AS23053 AS29606 AS4373 AS4373 Method 704 AS50881 AS5692 AS6019 AS6324 AS81824 AS83519 AS85049 AS85485 AS85485 Wire Standard ASTM B355 ASTM B470 ASTM D150 ASTM D2671 ASTM D8355 ASTM D876 ASTM F2639 ASTM F2696 ASTM F2799 ASTM F3230 ASTM F3309 ATSRAC Attenuation Automated Wire Testing System (AWTS) Automotive Avionics backshell batteries bend radius Bent Pin Analysis Best of Lectromec Best Practice bonding Cable Cable Bend cable testing Carbon Nanotube (CNT) Certification cfr 25.1717 Chafing Chemical Testing Circuit Breaker circuit design Circuit Protection cleaning clearance Coaxial cable cold bend collision comparative analysis Compliance Component Selection Condition Based Maintenance Conductor Conductor Testing conductors conduit Connector connector installation Connector rating connector selection connector testing connectors contacts Corona Corrosion Corrosion Preventing Compound (CPC) corrosion prevention Cracking creepage D-sub data analysis data cables degradat Degradation Delamination Derating design safety development diagnostic Dielectric breakdown dielectric constant Dimensional Life disinfectant Distributed Power System DO-160 dry arc dynamic cut through E-CFR electric aircraft Electrical Aircraft Electrical Component Electrical Power Electrical Testing Electrified Vehicles Electromagnetic Interference (EMI) Electromagnetic Vulnerability (EMV) Electrostatic Discharge EMC EMF EN2235 EN3197 EN3475 EN6059 End of Service Life End of Year Energy Storage engines Environmental Environmental Cycling environmental stress ethernet eVTOL EWIS certification EWIS Component EWIS Design EWIS Failure EWIS sustainment EWIS Thermal Management EZAP FAA FAA AC 25.27 FAA AC 25.981-1C FAA Meeting failure conditions Failure Database Failure Modes and Effects Analysis (FMEA) FAQs FAR FAR 25.1703 FAR 25.1707 FAR 25.1709 Fault fault tree Fixturing Flammability fleet reliability Flex Testing fluid exposure Fluid Immersion Forced Hydrolysis fuel system fuel tank ignition Functional Hazard Assessment functional testing Fundamental Articles Fuse Future Tech galvanic corrosion Glycol Gold Gold plating Green Taxiing Grounding hand sanitizer handbook Harness Design harness protection hazard Hazard Analysis health monitoring heat shrink heat shrink tubing high current high Frequency high speed data cable High Voltage High Voltage Degradation HIRF History Hot Stamping Humidity Variation HV connector HV system ICAs IEC 60851 IEC60172 IEEE immersion insertion loss Inspection installation installation safety Instructions for Continued Airworthiness insulating material insulating tape Insulation insulation breakdown insulation resistance insulation testing interchangeability IPC-D-620 ISO 17025 Certified Lab ISO 9000 J1673 Kapton Laser Marking life limit life limited parts Life prediction life projection Lightning lightning protection liquid nitrogen lithium battery lunar Magnet wire maintainability Maintenance Maintenance costs Mandrel mean free path measurement mechanical stress Mechanical Testing MECSIP MIL-C-38999 MIL-C-85485 MIL-DTL-17 MIL-DTL-23053E MIL-DTL-3885G MIL-DTL-38999 MIL-E-25499 MIL-HDBK MIL-HDBK-1646 MIL-HDBK-217 MIL-HDBK-454 MIL-HDBK-516 MIL-HDBK-522 MIL-HDBK-525 MIL-HDBK-683 MIL-STD-1353 MIL-STD-1560 MIL-STD-1798 MIL-STD-464 MIL-T-7928 MIL-T-7928/5 MIL-T-81490 MIL-W-22759/87 MIL-W-5088 MIL–STD–5088 Military 5088 modeling moon MS3320 NASA NEMA27500 Nickel nickel plating No Fault Found OEM off gassing Outgassing Over current Overheating of Wire Harness Parallel Arcing part selection Partial Discharge partial discharge at altitude Performance physical hazard assessment Physical Testing polyamide polyimdie Polyimide-PTFE Power over Ethernet power system Power systems predictive maintenance Presentation Preventative Maintenance Program Probability of Failure Product Quality PTFE pull through Radiation Red Plague Corrosion Reduction of Hazardous Substances (RoHS) regulations relays Reliability Research Resistance Revision C Rewiring Project Risk Assessment S&T Meeting SAE SAE Committee Sanitizing Fluids Secondary Harness Protection separation separation distance Separation Requirements Series Arcing Service Life Extension Severe Wind and Moisture-Prone (SWAMP) Severity of Failure shelf life Shield Shielding Shrinkage signal signal cable Silver silver plated wire silver-plating skin depth skin effect Small aircraft smoke Solid State Circuit Breaker Space Certified Wires Splice standards Storage stored energy superconductor supportability Sustainment System Voltage Temperature Rating Temperature Variation Test methods Test Pricing Testing testing standard Thermal Circuit Breaker Thermal Endurance Thermal Index Thermal Runaway Thermal Shock Thermal Testing tin Tin plated conductors tin plating tin solder tin whiskering tin whiskers top 5 Transient Troubleshooting TWA800 UAVs UL94 USAF validation verification video Visual Inspection voltage voltage differential Voltage Tolerance volume resistivity vw-1 wet arc white paper whitelisting Winding wire Wire Ampacity Wire Bend Wire Certification Wire Comparison wire damage wire failure wire performance wire properties Wire System wire testing Wire Verification wiring components work unit code

With the ramp-up of production across the entire supply chain, new vehicle concepts coming closer to being fielded, and continued research supporting the next generation of aircraft, 2022 was a big year for the aerospace industry. Lectromec was busy working on dozens of projects and performed R&D activities on:

  • Development of an electrical wire harness thermal model for estimating the impact of dynamic current loads (beyond the current derating for steady-state conditions in AS50881).
  • Expansion of Lectromec’s Arc Damage Modeling Tool (ADMT) to better model high voltage arcing events.
  • Expanded our high voltage DC power bank for representing the next generation of high voltage power supplies. Naturally, Lectromec used it for electrical arcing tests.
  • EWIS component degradation and expanding Lectromec’s existing remaining life prediction models.
  • A dozen new test fixtures for unique and novel test methods.

Lastly, Lectromec has finally been able to expand our footprint. Just this month, Lectromec’s office and lab doubled in size by expanding into an adjoining suite. This will give Lectromec the much-needed room for expansion of our staff and lab capabilities.

Top 5 of 2022

The following are the top five articles of 2022.


Corrosion avoidance of silver-plated conductors is not a simple task and visual inspection will only identify the most obvious degradation.

Red plague is corrosive galvanic corrosion that occurs between the silver plating and copper core of silver-plated copper wire. This has been a known issue since at least the 1950s and has popped up dozens of times since then with issues identified during initial product inspection, at product acceptance, as well as cases where red plague corroded wires and cables resulted in multi-million dollar rewiring efforts. While there are several means to test for red plague, understanding which to apply for an application is not clear. This article helps to clear this up.


With ‘high voltage’ becoming the new buzzword of aerospace, it is only natural that a couple of Lectromec’s top 5 articles of 2022 would be on high voltage.

One open question in the industry right now is what is the required performance of a high voltage wire/cable? Furthermore, what does a wire need to do in the high voltage system, and how does it need to perform? This article reviews some of the fundamental concepts involved and what needs to be done to show a wire is compliant with the vehicle’s requirements.


Again, with the high voltage. As a starting point for understanding high voltage and how it is impacting system design, a good place to start is with AIR7502. The SAE AE-7 committee is charged with the development and upkeep of standards, specs, and requirements regarding aerospace electrical power and equipment. In 2021, the SAE AE-7 committee published AIR7502, a document detailing the committee’s agreed-upon definitions for aircraft electrical voltage levels.


Aircraft are inherently expected to endure a wide variety of environmental challenges which include both High-Intensity Radiated Fields (HIRF) and lightning strikes. HIRF and lightning strikes similarly can produce significant EMI in aircraft EWIS, thus functions have been developed and incorporated into aircraft to prevent damage and interference from these sources. The lifespan of these protection functions is directly impacted by aircraft maintenance actions and can be improved by incorporating specific, detailed Instructions for Continued Airworthiness (ICA). Article.


It should be no surprise that an article on the certification of high voltage EWIS was at the top of the list for 2022. This article reviewed sections of the aerospace wiring system installation standard AS50881 and if there are gaps in how to support the high voltage aircraft sector. Beyond just identifying the gaps, the means to address these gaps were also proposed.

This was a topic that Lectromec presented at the 2022 FAA-Lead Science and Technology Electrical Systems and Wiring Interagency Meeting. The presentation will be posted early in 2023. Until that time, the article is available here.

Upcoming in 2023

The new year has not started, and it is gearing up for another busy year. In addition to all of the great projects the Lectromec team will be working on, you can expect to see articles on:

  • Continued developments of high voltage EWIS
  • A proposal on performance requirements for a high voltage wire and cable
  • Qualification of new conductor alloys
  • Assessment of commercial EWIS reliability, an update of Lectromec’s 2016 white paper
  • And much more.
Michael Traskos

Michael Traskos

President, Lectromec

Michael has been involved in wire degradation and failure assessments for more than a decade. He has worked on dozens of projects assessing the reliability and qualification of EWIS components. Michael is an FAA DER with a delegated authority covering EWIS certification and the chairman of the SAE AE-8A EWIS installation committee.