Page Content How to apply Please complete the following steps to initiate your membership application: Step #1. Review and download the TRAINAIR PLUS Operations Manual (TPOM) Step #2. Complete the Application Cover LetterCompleted and sign the application cover letter. Upload application cover letter in the online application form detailed in step #3 (below).The application letter should be on the letterhead of the training centre or organization and addressed to:Mr. Diego MartinezChief, Global Aviation Training (GAT)email: DMartinez@icao.int and cc: email@example.com Step # 3. Complete the online application form. For any enquiries, please email us at firstname.lastname@example.org.