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Certification

Risk Assessment and Small Aircraft Certification

he basic idea behind the F3230 is to limit the total number of assessments to those that are of particular concern for aircraft safety. This aligns with the change of part 23 aircraft the FAA has implemented for a more performance-based certification approach versus the detailed and prescriptive approach that the FAA used prior to 2016. Read more

Infographic – The Journey of An Aerospace Wire

From beginning of its life, aircraft wire and cable undergo thousands of hours of testing to ensure their reliable performance. To grasp how this process evolves, Lectromec has put together this infographic. Looking for help along the process? We can help with that too. Read more

25.981 is Not a Barrier – Part 2

FAA regulation 25.981 covers the requirements of fuel tank ignition prevention. While there are numerous elements that must be considered as part of the 25.981 regulation, this is a Lectromec series of articles, and here we focus on the electrical hazards that must be identified and mitigated as part of certification. Read more

AS50881 and EN3197 Harmonization

Working from a common knowledge base is critical for part interoperability. Take a standard screw; to install it requires a screwdriver (Phillips or Flathead), lining the screw up with the hole, and rotating clockwise to drive the screw. The screw works the same in Europe as it does in America, though the measurements might be […] Read more

How to Derate a Wire Harness

One of the question that we frequently receive at Lectromec is regarding the derating of wire harnesses. For those unfamiliar with the topic, we have covered this extensively in past articles. The quick summary of this is that due to the temperature rating of a wire, there is only a certain amount of electrical current […] Read more

Can the EWIS be Safe After a Modification?

The days of ‘fit and forget’ EWIS are at least a decade behind, the aircraft industry’s understanding of the implications of wiring as a system continues to evolve. New aircraft have gone through EWIS evaluations to ensure that the EWIS complies to regulations – not an easy task. Obviously, as the OEM design choices remain […] Read more

Testing for AS50881

For several decades now, the AS50881 has been a fundamental knowledge base used for the installation of aircraft wiring systems. The requirements laid out in this standard cover the electrical wiring interconnection system (EWIS) design and recommendations on the selection of qualified parts. Additionally, the design must be verified to show compliance. For commercial aircraft, this may be done as part of the overall certification package. For the military, this may be part of design acceptance. This article covers some of the testing necessary for showing compliance with AS50881.

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