Failed comms shuts down Argentinian airports

Flights have now resumed at three airports in and around Buenos Aires following the failure of a communications system.
Argentina´s National Civil Aviation Agency (ANAC) said flights had been temporarily halted Monday at Argentina´s Ministro Pistarini International Airport, also called Ezeiza International Airport, the Jorge Newbery Airport, and the San Fernando Airport.
Operations had failed “because of flaws in the communication system” that prevented communication between aircraft and control towers.
The Ezeiza airport handles 80 per cent of Argentina´s international flights.
According to the Aviation Herald (http://avherald.com/) following the outage an Alitalia Boeing 777-200 registration I-DISO performing flight AZ-681 to Rome Fiumicino (Italy) was the first aircraft to depart Buenos Aires´ Ezeiza Airport shortly after 20:00L.
Around 120 flights were estimated to be affected by the outage (if traffic resumed by Mar 22nd 00:00Z).
Argentina´s ANAC reported that the a 10-year old computer system had failed as well as its backup and secondary backup system.
Communication with the aircraft was not entirely lost. Legal requirements however prohibited takeoff and landing clearances without all systems operating. The cause of the failure is under investigation.

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