Design and Test Recommendations for Dielectric Strength and Insulation Resistance for Line Replaceable Units
This Aerospace Recommended Practice (ARP) provides guidelines for specifying dielectric withstanding strength and insulation resistance design and test requirements for aircraft line replaceable units (LRU's) used within a flight control and/or a utility system.
The testing is intended to verify that an LRU can operate safely at its rated voltage and withstand momentary over potentials due to switching, troubleshooting testing, surges, etc.. The testing is also intended to verify adequate design margin of the insulation system and detect workmanship problems.
Rationale: There is an industry need for consistent dielectric strength and insulation resistance design and test guidance for aircraft flight control and utility system line replaceable units. This document fulfills this need.