As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CRUISING AT FL390 "FADEC 2" LIGHT ILLUMINATED ON MWP FOLLOWED IMMEDIATELY BY A ROLL BACK TO FLIGHT IDLE OF NR 2 ENGINE. CREW COMPLETED CHECKLIST ITEMS. EIED 2 DISPLAYED A "F2A WF SOFT FAULT". ENGINE 2 REMAINED AT FLIGHT IDLE FOR ABOUT 20 MINS. DURING DESCENT AT ABOUT 14000' ENGINE RESUMED APPARENT NORMAL THRUST AND OPERATION. AFTER LANDING EIED 2 DISPLAYED MESSAGE LISTED ABOVE AND "F2A OTHER FADEC NOT CAPABLE" AND "F2A FADEC BIT FAULT" AND "F2B WF POSITION FAULT".