European and U.S. regulators are mandating software upgrades to CFM International Leap-1A engines that the manufacturer rolled out several months ago to address an issue linked to extreme cold-weather operations and experienced by one operator. The European Aviation Safety Agency and U.S. FAA directives call for operators of CFM-powered Airbus A320neos to upgrade full authority digital engine control (FADEC) and prognostic health monitoring (PHM) software within 90 days. EASA's AD ...

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