SAE ARP8482

Highly integrated electrical and electronic systems that perform functions within an aircraft may have potential failure conditions during and after exposure to the High-Intensity Radiated Fields (HIRF) or lightning environments. It is therefore necessary to conduct an HIRF and Lightning Safety Assessment (HLSA) that can identify potential failure conditions resulting from exposure to the aircraft HIRF and lightning environments. The failure conditions, failure conditions classifications, and independence principles identified by Aircraft Functional Hazard Assessment (AFHA), Preliminary Aircraft Safety Assessment (PASA), System Functional Hazard Assessment (SFHA), and Preliminary System Safety Assessment (PSSA), and lessons learned from previous experience, are used to identify proposed requirements during the development process. Ultimately, these requirements will result in a design capable of demonstrating that exposure to the HIRF and lightning environments will not result in adverse effects to the operation of the aircraft. This document provides guidance for conducting the HLSA process to classify the system and its equipment to the appropriate HIRF and Lightning Certification Levels (HLCLs). Guidance for the Particular Risk Analysis (PRA) process is found in ARP4761/EUROCAE ED-135, recognizing HIRF and lightning as particular risks but not providing guidance classifying systems HIRF and lightning certification levels. The guidance presented within this document addresses electrical/electronic system HIRF and lightning certification aspects, supplementing the guidance in ARP5583/EUROCAE ED-107 and ARP5415/EUROCAE ED-158.