MD-11
Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural MEL / CDL; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Provided Assistance; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Inflight Shutdown; Flight Crew Returned To Departure Airport; General Flight Cancelled / Delayed; General Maintenance Action
MEL; Procedure; Aircraft
Aircraft was dispatched with MEL XX #2 ENGINE COWL A/I VLV pos MNTR SYS-ENG 2 VLV-A/I MANF FAIL (DUCT BRST DET) -VLV OPEN.    During climb out from ZZZ received a level 3 ENG 2 A-ICE alert. Retarding throttle to idle cleared alert. The climb was stopped at FL230. QRH checklist; consultation with dispatch and Maintenance resulted in an engine shutdown; [advising ATC] and air turn back to ZZZ. The return and landing at ZZZ were uneventful.  My suspicion is that we probably did not have a bleed air leak in the Eng 2 ice duct; but rather a higher than normal temp in the area around the duct due to the anti-ice valve being secured open due to the MEL and high power settings during the climb in relatively high ambient temperatures. Although we did follow the QRH and shut down the engine as if it were a duct leak. I am sure I will receive feedback from my event report on whether or not that is correct after Maintenance has had time to inspect the aircraft.
MD-11 Captain reported an in-flight shut down of the number two engine and an air turn back to a successful precautionary landing.