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Signs of an Aging Wiring System

All components wear out over time, but the rate at which they degrade will vary depending on the quality of the product, how is it handled, and the environmental conditions in which the component is installed. To consider all the potential ways that an EWIS can fail, it can be overwhelming. As a brief list […] Read more

Impact of Corona on Electrical Systems

Corona is an area of electrical systems that many have some knowledge, but often only to the point of knowing that there is a voltage that should not be exceeded. It is common knowledge that factors, such as pressure, have an impact on when and how corona will happen, though the source of corona is […] Read more

Ampacity Improvements

When electrical current flows down a conductor, it gets warm due to resistive heating. The more current that flows, the warmer the conductor gets. Depending on the wire gauge, conductor conductivity, and ambient temperature of the wire location, the conductor temperature reaches the maximum certified temperature. This maximum electrical current is where the outward heat […] Read more

Aircraft wire degradation and looking in the arc

Those who have witnessed electrical arcing and aircraft wire degradation first hand know the feeling of the intense heat radiating from the arc location, the screeching sound (AC arcs), and the bright flash that leave you visually stunned for several moments. The problem with recording these events is that the arc flash is often so bright […] Read more

The “Big 3” aircraft wire system degradation assessment options

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

Basic concepts in understanding aircraft wire degradation

Aircraft wire degradation often means a reduction in a wire insulation’s ability to withstand physical, electrical, or chemical strain. Such reductions can lead to insulation breaches, which can result in system interruption. All modern wire insulations are long chains of molecules called polymers. Over time, due to various types of stress, there is wire degradation. […] Read more

XL-ETFE aircraft wire degradation

XL-ETFE insulated wires can be found on many commercial and military aircraft built since the 1980s and need to be included in the study of XL-ETFE aircraft wire degradation. As such, some aircraft have been operating for 30 years with the same wiring. The question that becomes more important with each passing day is the […] Read more

How to identify an aircraft wire to understand wire system degradation

If you try to identify an aircraft wire, particularly in service conditions, is not an easy task. However, we know it can assist with understanding details of wire system degradation. With the a variety of codes combined with the difficulty of finding the code on smaller gauge wires can try the patience of a skilled technician. […] Read more