This document is intended for use by manufacturers of aircraft, engines and Electronic Engine Controls [EECs] as a component change process and evaluation guideline. Its purpose is to provide an effective means of managing the modification of electronic hardware. The process defined in this document is based upon:

• an understanding of the electronic component market evolution, e.g., obsolescence;
• lessons learned from the effects caused by the introduction of electrical component changes in a service fleet environment;
• industry best practice; and
• an understanding of the applicable regulations.