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MIL-HDBK

A case study addressing EWIS sustainment needs

This white paper is a case study on recent work performed by Lectromec for the U.S. military to achieve Electrical Wire Interconnection Systems (EWIS) sustainment of an aircraft fleet. Read more

Joint Services Wiring Action Group (JSWAG) Spring 2016 updates

The Spring 2016 Joint Services Wiring Action Group (JSWAG) meeting was held in San Diego last week. Lectromec had the fortune to be able to attend this great meeting that included participants from all branches of the U.S. military as well as several foreign organizations. For those not familiar with the work of the JSWAG, […] Read more

11 improvements to MIL-HDBK-522 for aircraft wire systems

One of the best handbooks on EWIS routine inspection for aircraft wire systems is the military handbook MIL-HDBK-522, Guidelines for Inspection of Aircraft Electrical Wiring Interconnect Systems. The first version of the handbook was released in 2010 and provided a good starting point for EWIS inspection guidance. This guidance has been updated with the release […] Read more

What are the top 10 articles for aircraft wiring systems professionals for 2015?

Through its research, articles, videos, and continuous involvement in the aerospace community, Lectromec has been contributing to the knowledge base for aircraft wiring systems for three decades. To continue to further this goal, we have started to take a look at the most popular articles from the past year to see what readers find of […] Read more

Taking a look at aircraft wire testing and evaluation

For the past thirty years, Lectromec has been a leader in the area of aerospace wire testing and evaluation. In order to provide aerospace professionals with information to increase their knowledge of this complex topic, we began creating educational materials. Accordingly, Lectromec has published almost two-hundred articles, distributes a monthly newsletter, has a podcast, and […] Read more

MIL-HDBK-683: Techniques for effectively analyzing data

Failure analysis and system reliability are a fundamental part of the aerospace industry. With the extremely rare exception, modern aircraft are assessed and evaluated at the component, system, and aircraft level for all manner of failure impacts. This article will give methods for effectively analyzing data and discuss the commonly accepted Failure Mode and Effects […] Read more

Introduction to aircraft electrical power distribution systems

The trend in modern aircraft design is away from mechanical systems (hydraulics, pneumatics, etc.) and toward electrical components, or Aircraft Electrical Power Distribution Systems. There are several benefits of the modern design (particularly weight savings). However, as with any airplane design, no system can be fielded before it can be proven safe, reliable, and able […] Read more

Aircraft EWIS failure trends

The process for identifying an EWIS problem on an aircraft often follows these steps: At some point during aircraft operation a system malfunctions and the pilot reports the malfunction. Maintenance starts by replacing the system component. Depending on schedule and criticality, the maintenance action is scheduled. Often, the first action to be taken is the […] Read more

Aircraft wire inspection? Time tested guidelines

Performing routine aircraft wire systems visual inspections is a critical aspect of maintaining aircraft airworthiness and extending the component lifecycle. A visual inspection is the first step in assessing the condition of a component or determining what future steps need to be taken. This article discusses recommended techniques based on MIL-HDBK-522, which provides EWIS inspection […] Read more

EWIS SLEP: 5 days in the desert

As part of a project with the US Navy, Lectromec staff was in Tucson for one week supporting a service life extension program (SLEP). We all know that aircraft are designed for a given number of flight hours. One question that an asset manager may ask is if the aircraft has reached this threshold, is it still able to accomplish its mission? In the terms of commercial aircraft, can the asset deliver passengers safely and reliably? It is only reasonable that an assessment should be performed to determine what changes might be necessary to accomplish this. Read more