Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Weather / Turbulence
Air Traffic Control Provided Assistance; Flight Crew Took Evasive Action
Aircraft
Flight ZZZ-ZZZ1 wing A/I fail warning message in moderate ice. [Advised ATC] descended to 9000 ft. to exit ICE conditions.
Captain reported wing anti ice failure in cruise; requiring a descent to exit icing conditions.