A&E Architecture and Engineering A/C Aircraft A/G Air to Ground A/H Altitude/Height AAA Airport Airspace Analysis AAC Mike Monroney Aeronautical Center AADC Airport Average Daily Capacity AAF Airway Facilities Service AAF Army Air Field AAF-1 Director of Airway Facilities AAI Arrival Aircraft Interval AAI FAA Office of Accident Investigation AAL Alaska Region AAM Office of Aerospace Medicine AAMS Aircraft Arrival Management System AAP Advanced Automation Program AAR After Action Review AAR Airport Acceptance Rate AAR Airport and Aircraft Safety Research and Development AAS Advanced Automation System AASR Aging Aircraft Safety Rule AAT Associate Administrator for Air Traffic ABA FAA Office of Financial Services ABA Office of Budget ABDIS Automated Data Interchange System Service AC Advisory Circular ACAA Air Carrier Association of America ACAIS Air Carrier Activity Information System ACAS Aircraft Collision Avoidance System ACC Airports Consultants Council ACC Area Control Center ACCT Accounting Records ACD Automatic Call Distributor ACDO Air Carrier District Office ACE Central Region ACEP Airport Capacity Enhancement Plan ACF Area Control Facility ACFO Aircraft Certification Field Office ACFT Aircraft ACI-NA Airports Council International-North America ACID Aircraft Identification ACIP Airport Capital Improvement Plan ACIP Automated Conformity Inspection Process ACLS Automatic Carrier Landing System ACLT Actual Landing Time Calculated ACO Aircraft Certification Office ACO Associate Contracting Officer ACO Office of Airports Compliance and Field Operations ACR FAA Office of Civil Rights ACRP Airport Cooperative Research Program ACSEP Aircraft Certification Systems Evaluation Program ACT William J.