Advisory Circulars (AC)
Issued to inform the aviation public in a systematic way of nonregulatory material. An AC is issued to provide guidance and information in a designated subject area or to show a method acceptable to the Administrator for complying with a related 14 CFR part.
Taught in AF-K Quick reference, AF-A Quick reference, GEN-I Concepts, PP-F Quick reference, GEN-A Procedures, AF-B Quick reference and 4 more.