“AD c/w @ EOL w/ 12564:34 a/c FH and 8457 FC, TLB# 245372” – that and similar uses of aviation acronyms and abbreviations are pretty common in the technical aviation business. People who deal with aircraft transitions and airworthiness management are engineers, not writers. They will attempt to shorten every possible common phrase. On the other hand, some of them will use their “secret” knowledge of aviation acronyms to show their worth and vast experience. Whatever the reason, we have to know our way around most common abbreviations and this is why I would like to provide you with a shortened aviation glossary.