The validation process used in support of certification of the Boeing
777 gull fly-by-wire Primary Flight Control System (PFCS) and Autopilo
t Flight Director System (AFDS) is summarized. Tin's process includes
development of the system and component level requirements, ensuring t
he requirements are correct and complete, and ensuring the integrated
systems and airplane comply with the system and airplane level require
ments. Validation methods, traceability, problem tracking, and organiz
ational management of the process are described.