3D, 4D three- or four-dimensional 3G third generation 4096 Code combinations of four-digit transponder code A A A-BPSK A-QPSK A-SMGCS A/B A/C A/D A/G A/L A/L A/N A/P A/T A&P AAC AAC AAIB AAF AAI AAIPT AAIU AAL AALC AAMP AAR AATD
ampere(s) autotuned navaid aviation binary phase shift keying aeronautical quadrature phase shift keying advanced surface movement guidance and control systems autobrake aircraft analog-to-digital air/ground; air to ground airline autoland alphanumeric autopilot autothrottle airframe and power plant aeronautical administration communications airline administrative communications Air Accident Investigation Branch (U.K. equivalent of NTSB) airway facilities service Airline Avionics Institute Aging Aircraft Enterprise Team air accident investigation unit above aerodome level autonomous approach landing capability advanced architecture microprocessor Automated Aerial Refueling Aviation Applied Technology
Directorate (U.S. Army) AATT advanced air transportation technology AAS advanced automation system (FAA) ABC automatic brightness control AC advisory circular AC alternating current AC2 Dolby surround ACAA Air Carrier Association of America ACAC air-cooled air cooler ACAMS aircraft condition analysis management system ACARS aircraft communications addressing and reporting system ACAS airborne collision avoidance system ACC active clearance control ACC airspace control center ACC area control center ACD automatic conflict detection ACDO Air Carrier District Office ACE actuator control electronics ACE advanced certification equipment ACG Assessment Compliance Group ACIPS airfoil cowl ice protection system ACF area control facility ACK acknowledgment ACMF airplane condition monitoring function ACMP alternating current motor pump ACMS aircraft condition monitoring system ACNSS advanced communication/navigation/surveillance system ACP audio control panel ACS active control system ACS audio control system ACT active ACTC airport traffic control towers www.avtoday.com/av
ACTD advanced concept technology demonstration ACU aircraft communications system ACU antenna control unit ACU apron control unit ACU autopilot control unit AD airworthiness directive (FAA) ADAHRS air data attitude heading reference system ADAS automated weather observing system data acquisition system ADB airport database ADC air data computer ADC Air Defense Command ADE application development engineer ADF automatic direction finding ADG air-driven generator ADI attitude director indicator ADIRS air data inertial reference system ADIRU air data inertial reference unit ADL aeronautical data link ADLP airborne data link protocol ADLP aircraft data link processor (Mode S) ADM air data module ADMS airline data management system ADN aircraft data network ADO airline dispatch office ADO airport district office ADP air driven pump ADR address ADR Advanced Data Research ADR alternative dispute resolution ADRAS airplane data recovery and analysis system ADS air data system ADS automatic dependent surveillance ADS-A automatic dependent surveillance-addressed ADS-A automatic dependent
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surveillance-automation ADS-B automatic dependent surveillance-broadcast ADS-C ADS-contract ADS-R ADS-rebroadcast ADSEL address selective ADSP automatic dependent surveillance panel ADSSG ADS Study Group (ICAO) ADSU automatic dependent surveillance unit ADT air data tester AEA Aircraft Electronics Association AECU audio electronic control unit AED ALGOL extended for design AEEC formerly Airlines Electronic Engineering Committee (ARINC)
AFDS autopilot flight director system AFDX avionics full-duplex switched Ethernet AFEPS ACARS front-end processing system AFGCS automatic flight guidance and control system AFI authority format identifier AFIRS autonomous flight information collection and reporting system AFIS airborne flight information system AFIS automated flight inspection...