Md-11 flight crew reported they received several warnings 'air systems' and 'a/I duct'; shut down th...

Narrative:

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 right 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.

Original NASA ASRS Text

Title: 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.

Narrative: 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.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1486681
Time
Date	201710
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	MD-11
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Fuel Drain
Person 1
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 160 Flight Crew Total 10000 Flight Crew Type 600
Person 2
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 65 Flight Crew Total 12000 Flight Crew Type 2000
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy Inflight Event / Encounter Fuel Issue

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.