MD-11
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Confusion
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural MEL / CDL; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Fuel Issue
Flight Crew Overcame Equipment Problem; Flight Crew Requested ATC Assistance / Clarification
Aircraft; Human Factors; Procedure
Received a level II Tnk 2 Fwd Tnk Lo Caution upon block out. QRH directed us to pull the associated CB and call Maintenance. We did and were directed to a maintenance troubleshooting area with all 3 engines turning. Maintainer came onboard through the avionics compartment. He troubleshot the pump and said it would have to be MELed. With concurrence from Maintenance Control; MEL 28 Main Tank Pumps -- Tank 2 Forward was prescribed. We received an adjusted flight plan from our dispatcher and took off. The aircraft was still indicating the LVL II Caution. At top of descent; we thought it would be prudent to open the #2 and #3 cross feed valves in association with the QRH. We started our descent at FL360 and somewhere around FL300 we noticed that the #2 engine had rolled back and stabilized at approximately 27%. We conducted an uneventful air start in accordance with the QRH. We then informed ATC that we had an engine problem. We kept the #2 engine at idle for approximately 6 minutes before adding power. We conducted an uneventful landing with all engines operating normally. We informed the emergency crews that we required no further assistance while exiting the runway.
It isn't clear to us why the engine rolled back. We believe engine flamed out due to fuel starvation; which we believe was a malfunction of the fuel system.
MD-11 flight crew reported successfully restarting #2 engine following an in-flight rollback possibly related to fuel system MEL item.