ETOPS area of applicability
This post is coming a little late but I just wanted to point out that an ETOPS area of applicability is not something you can find in a Boeing manual. AOA are based on one engine inoperative cruise speeds chosen by the company, approved by the regulatory authority, and listed in the company op specs. 1230 nm may very well be FJ's AOA. What you will find in the Boeing manual are a range of drift down and one engine inoperative speeds that you can choose from.