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International Test Standards for Aircraft Wire

The Lectromec Podcast

Release Date: 06/21/2019

Is my Aircraft Wiring Serviceable? show art Is my Aircraft Wiring Serviceable?

The Lectromec Podcast

This idea of serviceability is applicable to other engineering disciplines and is undoubtedly applicable to aerospace vehicles. From our perspective at Lectromec, understanding the serviceability of aircraft wiring is critical. However, to determine an aircraft wiring system serviceability state requires the limit state to be defined and assessed. Here we propose three such properties of a serviceable aircraft wiring system.

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International Test Standards for Aircraft Wire  show art International Test Standards for Aircraft Wire

The Lectromec Podcast

Frequently, Lectromec's articles and podcasts have focused on wire and cable testing from US-focused standards such as the SAE and US military (MIL) documents. While these are standards frequently cited, there are other standards organizations that support the aerospace wiring community.

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Replacing Old Aircraft Wire show art Replacing Old Aircraft Wire

The Lectromec Podcast

As aircraft age, it is natural to contemplate the aircraft condition as to how much longer the equipment can be maintained. Typically, after the engines, structures, environmental control system (ECS), navigation, landing gear, interiors, flight controls, and fuel system are considered, the question will ultimately appear, “do I need to replace my wires that are 15/20/25/30 years old?” While it would be nice if there were a simple answer, like all engineering, it comes down to the evaluation of the syst

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Selecting Coaxial Cables for Aircraft Application show art Selecting Coaxial Cables for Aircraft Application

The Lectromec Podcast

The transmission of electrical energy is, surprisingly, not a trivial task. At low frequencies and low power, a very primitive wire construction is possible and can be successful for extended applications. As frequencies increase, the need for focused attention becomes ever more apparent.

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EWIS and Instructions and Continued Airworthiness show art EWIS and Instructions and Continued Airworthiness

The Lectromec Podcast

Aircraft are delicate creatures. They can be very finicky when not treated right and the design of an aircraft can only go so far to ensuring that the aircraft has a long, successful life. Without a doubt, many of Lectromec’s articles address the design and manufacturing phases of an aircraft’s life. As highlighted in the last article, technological and engineering hurdles must be overcome for aircraft electrical wiring interconnect system (EWIS) to achieving a fault-free life.

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Cold Testing of Wires show art Cold Testing of Wires

The Lectromec Podcast

The environmental extremes under which wiring exists in aircraft can rapidly degrade materials that are not prepared or designed for those conditions. Without a doubt, high-temperature ranges that are typically considered for aircraft wiring eliminate most wire insulation types that are suitable for ground-based home applications.

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Should Polyimide Insulated Wire be Trusted? show art Should Polyimide Insulated Wire be Trusted?

The Lectromec Podcast

The history of polyimide insulated wire is one that has numerous opinions and a lot of misconceptions. After several incidents involving polyimide wire in military and commercial aircraft, many within the aerospace industry refused to put any polyimide insulated wire/cable onto the aircraft they design/maintain. As is often the case with components involved in incidents, a lot of facts and myths get jumbled together.

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25.981 is Not a Barrier show art 25.981 is Not a Barrier

The Lectromec Podcast

The certification of an aircraft requires the expertise of dozens of disciplines coming together for a single effort. Certainly, as the electrical wiring interconnect system (EWIS) has developed over the last couple of decades, the interaction with other systems and components is becoming better understood as the requirements are becoming more pronounced.

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DO-160, EWIS, and EMI show art DO-160, EWIS, and EMI

The Lectromec Podcast

From an implementation perspective, it cannot be understated how much EMI can impact system performance ranging from degraded performance to make a system completely inoperable. Thankfully, there are test methods to evaluate the susceptibility of electromagnetic interference of a wire harness design.

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Selecting Aircraft for Inspection and Work Unit Codes show art Selecting Aircraft for Inspection and Work Unit Codes

The Lectromec Podcast

A couple weeks ago, Lectromec's podcast focused on Condition Based Maintenance (CBM) and discussions at the mechanical equipment and subsystems integrity program (MECSIP) managers meeting. To continue with that theme, this article focuses on two specific presentations and topics that were covered: sustainment authorization and EWIS working unit codes (WUCs).

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More Episodes

Frequently, Lectromec's articles and podcasts have focused on wire and cable testing from US-focused standards such as the SAE and US military (MIL) documents. While these are standards frequently cited, there are other standards organizations that support the aerospace wiring community.

Thankfully, many of the standards share a common base and, as is the case with many of the SAE standards, these have been harmonized with European standards. In this podcast, we will review some of the European wire/cable test standards.