Partial analysis of 2014 aircraft EWIS failure rates

November 24, 2014 Michael Traskos

Periodically, Lectromec reviews the state of the industry and EWIS failure rates. In this article, Lectromec reviews the January – November data in the FAA’s service difficulty report (SDR) database as of November 16, 2014 for incidents reported to have occurred during 2014. Read more

MIL-HDBK-454 handbook guidelines for EWIS components

November 14, 2014 Carina Cannon

This article covers eight out of the 78 military guidelines from the General Guidelines for Electronic Equipment handbook (MIL-HDBK-454) applicable to wire system component testing, EWIS component selection, and good wiring practices. The handbook covers guidelines for the selection, handling, and application of electronic equipment on aircraft. Read more

Dealing with EMI and EMV on radio frequency (RF) cables for aerospace applications

November 5, 2014 Omid Orfany

The aerospace industry has been dealing with Electromagnetic Interference (EMI) and Electromagnetic Vulnerability (EMV) since the early 1900s. EMI can cause interruptions ranging from poor signal quality to an overall system malfunction, which can result in devastating outcomes for any type of plane. EMI is generated by natural phenomena like lightning and static electricity (called […] Read more

Latest update from the October 2014 SAE Wire Committee Meeting

October 22, 2014 Michael Traskos

The meeting for the SAE Fall 2014 8A and 8D groups covered a lot of ground and developments in the aerospace wire and cable world. The SAE Wire Committee Meeting, held in Tempe, Arizona, consisted of three days of meetings, presentations and task group reports. Here are some of the developments from the SAE meeting. […] Read more

Aircraft wire abrasion resistance

October 15, 2014 Michael Traskos

The proper installation of wiring will dramatically reduce unnecessary stresses and result in an uneventful service life. In the real world, wires rub against various airplane components and can create unsafe conditions from both physical and functional viewpoints. Because of this, materials must be selected that can endure mechanical stresses and not pose a hazard […] Read more

Aircraft EWIS regulations in China

October 2, 2014 Michael Traskos

There have been significant developments in the Chinese aerospace industry over the last couple of years. The largest of these developments is the design commencement of the Comac C919 narrow-body aircraft. It is a huge undertaking with the projected introduction into service in 2018. It has been necessary to standup an infrastructure capable to support […] Read more

Assessment of mechanical stress on aircraft wire insulation

September 19, 2014 Michael Traskos

Mechanical damage is one of the most common causes of aircraft wire insulation failure. This mechanical damage can come from a hundred different sources (maintenance actions, chaffing, pinching, etc.), but many put a similar basic stress on the wire. One area that must be considered from a wire selection and qualification perspective is pinching a […] Read more

The impact of series arcing

September 15, 2014 Michael Traskos

While electrical arcing on aircraft is often associated with a dramatic failure event, a much more common occurrence on aircraft is series arcing. Series arcing can contribute to overheating and component damage, reduction in signal quality, and poor/sporadic performance of electrical equipment. In this article, we discuss the basics of series arcing, the failure effects, […] Read more

Aircraft EWIS failure investigation

September 5, 2014 Emma Schwoerer

When systems fail, it is often necessary to identify the fault source in order to know where to assign the blame (legal), determine if a maintenance action is necessary (customer support), or improve a product (development). When it comes to aerospace incident investigation, it can be difficult to isolate the cause of faults occurring in-flight. […] Read more

Corrosion prevention compounds (CPCs) and aircraft EWIS

August 29, 2014 Michael Traskos

Corrosion prevention compounds (CPCs) are compounds that are placed on many aircraft components. Applied to a variety of mechanisms, these compounds have been found to increase structural life by reducing corrosion. While there are benefits to reducing corrosion, the impact of the CPCs on wire insulation and the aircraft Electrical Wire Interconnection System (EWIS) in […] Read more

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