Reusable avionics software. Evolution of the flight management system

This paper will look at the reuse evolution of the Honeywell Flight Management System software (FMS) from the Boeing 757/767 and Airbus A310 development of the 1980's to the advanced designs of the Airbus A340 and Boeing 777 of the 1990's. This paper will explore the lessons learned and the future challenges for the development, modification and maintenance of software in a reusable environment.