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HV Connector Failures and Part Selection

With the current shift toward hybrid and electric aircraft, deeper understanding of high voltage connectors and their potential failure modes is required. In this article, we discuss failure modes and selection criteria for high voltage connectors on aircraft. Read more

Corrosion Prevention and AC 43-206 Part 3

In this article, we continue the discussion of AC 43-206 by addressing the equipment and tools utilized in corrosion prevention and maintenance as well as identifying potential hazards to personnel and equipment. Read more

S&T 2022 Meeting Report

As in any scientific industry, aerospace across the globe benefits from the sharing of information and research. The annual S&T Electrical Systems and Wiring Inter-Agency Meeting is held each December with exactly this goal. The following are some highlights from the presentations and discussions from the 2022 meeting. Read more

Corrosion Prevention and AC 43-206 Part 2

In this article, we look at procedures identified in AC 43-206 for the cleaning of avionics equipment to remove and prevent corrosive deposits. After initial inspection and identification of corrosion in avionics systems, the next logical step is to perform cleaning procedures to reduce/eliminate the risks from corrosion. Inspection and cleaning procedures should be performed on a regularly scheduled basis, as well as immediately following any situation(s) in which the avionics components are exposed to probable sources of contamination (weather, salt spray, spilled fluid(s), cleaners used for nearby systems, and any remnants from repair). Read more

Fluid Immersion Testing of EWIS Components

From fuel to hydraulic oil to sodas, aircraft wires and cables are exposed to a wide range of fluids and, generally, the insulations must not show degradation that would impact their airworthiness. Material compatibility is important for all parts of the aircraft and the wiring system is no exception. The means to assess material compatibility between fluids and wires/cables is done with fluid immersion testing.

Fluid immersion testing is straightforward but requires a lot of materials, a lot of prep work, and a lot of hands-on attention to detail. The fundamental idea of fluid immersion testing is for components to be submerged in the fluid and observed for any changes to the material or components. Some test details and the impacts of the test results are covered here.

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Corrosion Prevention and AC 43-206

This article will discuss inspection methods for evidence of corrosion on aircraft and aircraft systems; a future article will address some of the maintenance and cleaning guidance offered by AC 43-206. Read more

Top 5 Articles of 2022

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. Find out what were the top five topics on Lectromec’s blog for 2022. Read more

The Special Little Wire – Holiday Season 2022

. “The Special Little Wire” is a story about a cheerful 24AWG wire journey to achieve his dream of being installed on an aircraft. But will he be able to become part of an aircraft Electrical Wiring Interconnection System (EWIS). Read more

Flex Endurance Test Basics

While most wire installed in an aircraft is placed in static conditions, there are still several harnesses that must support regular flexing. Applications such as landing gears, wiring attached to panels/doors, and flight control surfaces have regular flexing. What is the best approach to selecting and verifying wires/cables for these applications? It turns out that there are several options. Read more

IEC 60851-5 Winding Wires – Electrical Property Test Methods

Winding wires, or magnet wires, are the wires used to construct coils in electronic components (transformers, relays, etc.) that generate the component’s magnetic field. These wires are primarily composed of a copper or aluminum conductor with a very thin layer of insulation. The insulation layer is as thin as possible to keep the wire cross-section small making it possible to squeeze the highest number of windings in the motor. Whereas most electrical wires are cylindrical, winding wires often have a rectangular cross-section profile; this allows for maximum cross-section during winding, thus reducing potential losses. Read more