Developing Scheduled Maintenance Requirements for HIRF/Lightning Protection on the 777 Airplane

This paper discusses development of the scheduled maintenance development and testing methods for maintaining High Intensity Radiated Fields and Lightning (HIRF/L) protection on the Boeing 777 airplane. It describes HIRF/L, the effects of HIRF/L on the 777 airplane, and the engineering design that provides HIRF/L protection for 777 critical and essential systems. The main body of the paper discusses development of a scheduled maintenance program to maintain safety and continued airworthiness for the HIRF/L design on the 777. It includes the rationale and engineering judgment used in developing the maintenance program for this first completely fly-by-wire (FBW) Boeing airplane.