View Latest Blog Entries
Close
Categories
Testing & Assessment Certification Standard & Regulation Aging Wires & Systems Maintenance & Sustainment Protection & Prevention Management Conference & Report Research Miscellaneous Arcing
Popular Tags
Visual Inspection High Voltage AS50881 MIL-HDBK MIL-HDBK-525 FAR Electromagnetic Interference (EMI) AS4373 Maintenance FAR 25.1707 Degradation Wire System
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 Aluminum arc damage Arc Damage Modeling Tool Arc Fault (AF) Arc Fault Circuit Breaker (AFCB) Arc Resistance 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 B230 ASTM B355 ASTM B470 ASTM D150 ASTM D2671 ASTM D495 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 characteristic impedance Chemical Testing Circuit Breaker circuit design Circuit Protection cleaning clearance Coaxial cable cold bend collision comparative analysis Completed Harness Compliance Component Selection Condition Based Maintenance Conductor Conductor Testing conductors conduit Connector Connector Durability Connector Failure Modes 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 EMI 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 Filter Line Cable Firewall Fixturing Flame Resistance 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 construction Harness Design harness installation 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 High Voltage Systems HIRF History Hot Stamping Humidity Variation HV connector HV system ICAs IEC 60851 IEC60172 IEEE immersion impedance 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 6722 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-F-5372 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 quadrax 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 SAE J1127 SAE J1128 Sanitizing Fluids Scrape Abrasion 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 signal reflection 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

By: Michael Traskos

Lessons learned from NASA: Wire identification, harness clamping, and more

Michael Traskos
Learning from the mistakes of the past is critical for ensuring reliability of systems created today. These lessons may be contained in industry standards documents with little or no explanation as to why the requirements were created (such as AS50881). This lack of historical knowledge and the loss of the answer to ‘why’ can leave […] Read more

Heat shrink tubing application and aircraft EWIS components

Michael Traskos
Heat shrink tubing can be found in nearly every location on aircraft and can interact with aircraft EWIS components. These materials protect wire repairs, provide additional abrasion protection, and prevent the ingress of fluids (and in a pinch, may be used as a secondary harness support when other options are not viable). Although this product […] Read more

Life prediction of aircraft EWIS components

Michael Traskos
Aircraft vehicle reliability rests on well-designed components maintaining full functionality through the entire life cycle, or at the very least, maintaining full functionality until a predictable life limit is reached so that sustainment activities can be performed. Selection of wires and EWIS components is no different. The selection process starts with the functional requirements (electrical […] Read more

Considerations for Electrical Bonding

Michael Traskos
Electrical bonding is the practice of connecting equipment cases or structure to ground to prevent electric shock. This provides a return path for any stray voltage that the case may be exposed to via component failure (e.g. wire shorted against case). The reason why proper electrical bonding techniques are so important is that it protects […] Read more

EWIS: A 13-minute summary of MIL-HDBK-525

Michael Traskos
This Lectromec presentation provides a brief summary of MIL-HDBK-525, “Electrical Wiring Interconnect System (EWIS) Integrity Program.” It provides a starting point for those involved in Mechanical Equipment and Subsystems Integrity Program (MECSIP) or those new to the EWIS service life extension efforts. This thirteen-minute presentation is a good description of Electrical Wire Interconnect Systems (EWIS) […] Read more

Aircraft circuit protection: A review of 5 technologies

Michael Traskos
Two weeks ago we posted a blog on the selection process for circuit protection/wire pairs. Today, we produce a grid to help you understand common aircraft circuit protection types that can be found on aircraft. The five device types talked about here are the thermal circuit protection, fuse, magnetic circuit protection, Arc Fault Circuit Breaker […] Read more

270VDC arcing in aircraft wiring

Michael Traskos
In a recent presentation to the SAE at the biannual meeting, Lectromec presented a summary of the work that was performed by several companies and the Federal Aviation Administration (FAA) last summer. These tests were performed at the FAA’s Technical Center in Atlantic City on 270VDC in aircraft wiring. There were four test objectives: Perform […] Read more

7-step process for aircraft wire size and circuit protection selection

Michael Traskos
Sometimes the design guidance that is a couple of decades old is still valid. The following flowchart is from the NASA Technical Memorandum 102179 – 1991. The chart provides a flow for the design considerations for circuit protection, starting with determining the current need and ending with the implementation of the system. The 7 steps […] Read more

What you missed from the SAE meeting regarding aircraft wire testing

Michael Traskos
If you had other business commitments and couldn’t make the recent SAE 8A/D meeting this week that included topics related to aircraft wire testing, we have put together a quick summary from the committee meetings. RoHS Compliance The Reduction of Hazardous Substances (RoHS) has been something the aerospace industry has been struggling to comply with […] Read more

The “Big 3” aircraft wire system degradation assessment options

Michael Traskos
If you have concerns about aircraft wire system degradation and need to assess the condition of an aircraft’s wire system, there are several options. For those looking for opens and shorts type faults, HiPot and/or Time Domain Relectometer (TDR) equipment are great options. To determine the impact of wire problems with the fleet, maintenance logs […] Read more