The devil is always in the details, and the additive effects of very small deviations from specifications can quickly add up to cause poorly functioning or electrically noisy avionics and electrical systems, or even be causal in the starting of an inflight fire from overheating or sparks.rnWhether it's in poor quality terminals or impedance mismatches in avionics coax or lower tolerances or less quality control of uncertified parts, there is always something waiting to bite you when you deviate from the standards.
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