ACARS

ACARS (Aircraft Communications Addressing and Reporting System) is a digital datalink system that exchanges short messages between aircraft and ground stations over radio or satellite networks.

Aircraft communications addressing and reporting system: The standardized system of airborne and ground components that exchanges addressed digital messages with aircraft. This formal system expands the acronym ACARS and defines its components and message handling.
Aircraft operational control: The airline function that monitors flights and coordinates operational decisions with flight crews. ACARS provides a routine channel for exchanging operational updates between crews and dispatch.
Aeronautical Radio, Inc.: A U.S. aviation communications company founded by airlines to provide radio services to aircraft. ARINC developed and operated the original ACARS service for participating airlines.
Controller–Pilot Data Link Communications: A standardized digital service for exchanging messages between air traffic controllers and pilots. CPDLC focuses on controller-pilot exchanges, while ACARS also carries airline operational traffic.
Aircraft Communications Addressing and Reporting System message: A short digital transmission exchanged through ACARS, often formatted for automated processing. Individual messages carry reports, requests, clearances, and other operational information.
Aircraft condition monitoring: The collection and analysis of data about an aircraft’s systems and operating condition. ACARS can transmit condition reports that help airlines and maintenance teams monitor aircraft.
Aircraft telex: A system for exchanging typed text messages between aircraft and ground stations using radio links. ACARS developed from earlier airline radio-teletype communication practices.
Aircraft voice communication: The transmission of spoken messages between aircraft and ground stations by radio or satellite. Voice permits flexible conversation; ACARS favors concise, structured digital exchanges.
Aircraft Communications Addressing and Reporting System management unit: An onboard avionics unit that routes ACARS messages between aircraft systems and communication links. The management unit coordinates message handling and selects an available datalink.
Aircraft maintenance: Inspection, repair, and servicing performed to keep aircraft airworthy and reliable. ACARS maintenance messages can report faults and help prepare repairs before arrival.

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