MD-11
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 114; Flight Crew Total 10430; Flight Crew Type 1812
Aircraft Equipment Problem Critical
Flight Crew Diverted; Flight Crew Landed in Emergency Condition; General Declared Emergency
Aircraft
During cruise; FL310 Oceanic route; got a Master Warning; level 3 'AIR MANF 2 FAIL'.  AIR synoptic page displayed red line from #2 engine.  Followed QRH procedures.  Brought #2 throttle to idle; synoptic red line turned amber along with a PACK 2 OFF message.  Selected Confirm Engine Out on FMS and selected MCT.  Discussed problem on SAT phone with dispatch and maintenance.  All agreed on course of action.  We declared emergency/mayday on CPDLC and on HF and received clearance to turn around and descend to FL280.  Made radio call on 121.5 and 1XX.XX stating our actions. We noticed that our emergency clearance received on CPDLC came after CPDLC logged onto ZZZZ FIR; 200nm prior to the switch over point.  CPDLC would not relog onto ZZZZ1 FIR. Therefore we also declared the emergency/mayday with ZZZZ1 FIR on HF.  ZZZZ1 FIR informed us on HF that ZZZZ airport would open if we would prefer; so we opted to land at ZZZZ airport.
This event occurred enroute at cruise; FL310. I was pilot monitoring. Captain was asleep in bunk. Relief Officer (RO) was in Captain's seat. On oceanic route we received an aural tri-tone alert and flashing Master Warning and a Level 3 'AIR MANF 2 FAIL' alert. The Air synoptic page was displayed with a red line from engine 2 to #2 pack. I grabbed the QRH and read the checklist and the RO performed the actions. Specifically; the checklist called for #2 throttle to idle. After completing this; the red line turned amber and pack 2 turned amber and OFF. Conf Eng Out was displayed on FMS and we selected it to give us drift down altitude and MCT. At this time I left my seat to wake the Captain up. Once the Captain was seated and familiar with the situation he called Dispatch and Maintenance on SAT phone. We decided to turn around for ZZZZ airport since it was closer than destination (dispatch informed us ZZZZ1 airport was closed). We received a rerelease for new destination to ZZZZ airport. We declared an emergency on CPDLC and also with ZZZZ radio via HF. We received clearance to proceed back to ZZZZ airport and to descend to FL280. I announced our intentions on 1XX.XX so other aircraft on the nearby routes would know what we were doing. ZZZZ radio was very helpful and offered that ZZZZ1 airport could be opened up for an emergency aircraft with one hour notice. Since we were two hours out we accepted this and informed dispatch; and subsequently received a rerelease for landing ZZZZ1. No fuel dump was necessary. We requested CFR as a precaution and cancelled them after an uneventful landing.
MD11 flight crew experiences a Level 3 'AIR MANF 2 FAIL' alert and the Air synoptic page was displayed with a red line from engine 2 to #2 pack. The engine is shut down and the flight diverts to the nearest suitable airport.