The American Certificate Management Office (CMO) has certificate management oversight responsibilities for the following air carriers and associated air agencies:

Part 121 Air Carriers
American Airlines Inc, Fort Worth, TX (AALA)

Part 145 Repair Stations
American Airlines Inc, Tulsa, OK (AALR)
American Airlines Inc, DFW, TX (A3AR)
Texas Aero Engine Services LLC, Fort Worth, TX (XE5R)