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Detailed Discussion of MIL-STD-1353 (Part 1): Tin Plating
ASTM F3309- A Simplified Safety Analysis for Small Aircraft
WPAFB Wire Study
IEEE 1584-Arc Standard
Top 5 Articles from 2019
The team here at Lectromec would like to start this article thanking all of our clients for trusting us with your EWIS component and system testing/certification needs and we look forward to supporting your goals in 2020.
At the end of every year, Lectromec rummages through that year’s publications and articles to find the most popular ones. In 2019, this required going through 26 articles. Here are the top 5 Lectromec publications of 2019.
Read moreS&T 2019 – Meeting Report
Getting the Right Bonds
Things were so much easier with aluminum aircraft structures. The structure acted as an EMI shield, electrical grounding could be done right to the structure without additional effort, and the electrical mating of the structure was straight forward. Now, with composite structures, aircraft design concepts such as electrical bonding, particularly in the case of handling lightning strikes, becomes more important.
When done right, the impact of a lightning strike should have a limited impact.
In this article, we review the concepts around primary aircraft bonding, its requirements, and the implementation as they relate to lightning strike.
Read moreNon-Standard Standard Part Performance
EWIS Physical Hazard Assessment
Aircraft system safety assessments are not a new concept. These safety assessments have a defined process for evaluating an aircraft which involve identifying its failure modes, top-level events, and eventual means to achieve an unsafe condition. Documents such as the SAE ARP4761 provide guidelines and methods for conducting the safety assessment process on civil airborne systems and equipment.
To follow the typical development cycle, the aircraft failure hazard assessment (FHA) is followed by the system failure hazard assessment and performed in parallel with the preliminary system safety assessments (PSSAs). This then evolves into the system safety assessments (SSA) and common cause analyses (CCAs). For those with a systems reliability background, this should all be second nature. For the rest of the community, these are often terms that we come across because of our work in this field.
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