MD-11
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 160; Flight Crew Total 10000; Flight Crew Type 600
Situational Awareness
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Fuel Issue
Air Traffic Control Provided Assistance; Flight Crew Returned To Departure Airport; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Landed in Emergency Condition; Flight Crew Inflight Shutdown; Flight Crew Landed As Precaution
Aircraft
While climbing; at about 31000 feet; we received a level alert; 'Air Sys 2 Off'. Referenced the checklist; noticed on the overhead panel the Number 2 Main light was also illuminated. Then a second level 1 Alert was displayed within a couple minutes of the first; 'Air Sys Man'. We ran the checklist for that which leads you to selecting air system into manual. However; before we were able to select manual; we got a level 3 'Engine Number 2 Anti Ice Duct'. This went away after about 10-15 seconds. The captain then got on Satcom to discuss the situation with dispatch and Maintenance Control. The decision was made by all to divert back to ZZZ instead of continuing into ZZZZ where there was possible icing on descent and a lack of parts and hotel availability; etc. (There was no tail anti-icing capability). We were showing a landing weight of about 520;000 lbs; so we decided to dump about 30K worth of fuel once we were in range to ZZZ. We coordinated this with ATC. Upon the completion of the fuel dump; we got a 'Dump Valve R Disagree' level 2 message. The checklist lead us to select the emergency stop switch. The fuel dump appeared to have stopped although we were unsure of the right dump valve position. Once on communication with tower; we asked for a vehicle to inspect the runway and aircraft upon landing to check for fuel leaking out of the right dump nozzle. We stopped the aircraft off the landing runway; and the airport authority inspected the aircraft. No fuel was leaking at that time. As we taxied in; the captain noticed we had 10K of fuel left in the tail; he asked me to go to manual mode on the fuel system in an attempt to pump the fuel out of the tail so the plane could be safely offloaded. As soon as we selected manual; the airport authority saw fuel dumping out of the right dump nozzle; so we immediately selected automatic again to stop the fuel from spilling. We probably dumped 300-400 lbs on the taxiway; and the airport authority took proper action to clean the fuel spill. We blocked in; and wrote everything up.
[Report narrative contained no additional information.]
MD-11 flight crew reported they received several warnings 'Air Systems' and 'A/I Duct'; shut down the Number 2 engine; and returned to the departure airport.