What was found
FLT#8026, LGW-BOS. (ETOPS) 'CA+FO MCDU LOST ALL DATA FOR "UTC" "SPD/ALT" "DIST" AND "EFOB" FIELDS. FO WAS FLYING PILOT W AUTOPILOT 2 ENGAGED RESET PROCEDURE FMGC1 WAS RESTORED, RESET PROCEDURE FOR FGMC2 WAS ATTEMPTED 3 TIMES BUT NOT RESTORED #2 DATA RETURNED W NO FURTHER ATTEMPT ON ITS ONW; REMOVED AND REPLACED FMGC #2 AND VERIFIED S/W P/N'S. AFS TEST AND GROUND SCANNING OK REF AMM 22-83-34, AMM22-96-00, AMM22-91-00.'