Yay! There is a whole new book dedicated to Aviation English training, and it is free!
Borowska, A. & Enright, A. (Eds.) (2016). Studi@ Naukowe 29: Changing perspectives on Aviation English training. Warsow: Uniwersytet Warszawski.
The e-book collects papers presented at the ICAEA Conference in Warsaw in June 2015, which explains its European focus (except for one article by a New Zealander). Great initiative, though. Just check out the variety of topics in the table of contents!
Part I. Aviation English Training Theoretical Issues
Aviation English for the Next Generation – HENRY EMERY
Defining meaningful material for the teaching of English for aeronautical communications – NEIL BULLOCK
Effective Aviation English Teaching Catering to the Various Needs of AbInitio, Trainee and Operational Pilots and Controllers – COLIN DAVIS
Training Needs Beyond the ICAO Language Proficiency Requirements – PEGGY WEGLER
Do Expert Speakers Need to Practice a Language? – ANNA BOROWSKA
Defining Competency Qualification of Aviation English Instructor – OLENA PETRASHCHUK
Modern technologies in teaching specialised languages – MARCIN ŁĄCZEK, PAWEŁ SZERSZEŃ
Part II. Aviation English Training Practical Issues
ICAO Circular 323: Guidelines for Aviation English Training Programmes – TERENCE GERIGHTY
Designing an Aviation English Instructors Training Course – OLENA PETRASHCHUK
Aviation English Games – COLIN DAVIS
Specialised Language Teaching and Learning through Modern Technologies – ANNA BOROWSKA, MARCIN ŁĄCZEK, PAWEŁ SZERSZEŃ