What was found
DURING CRUISE RECEIVED LEVEL 1 "R EMER AC OFF". F/O LOST MCDU NR 2 AND FMC2, DEU NR 2, DU4, 5 AND 6 NOTE: VERBAL FROM CREW ON POST FLIGHT, DUMPED 62.0 LB FUEL DUE ATB. CHECKED EPCU FAULT REVIEW AND FOUND "LEG 1 IN AIR" REAC SENSE RELAY/INTFC. CHECKED CURRENT FAULT AND ALSO HAD "REAC SENSE RELAY/INTFC". A/C HAS HISTORY. REPLACED RELAY R2-5157 PER FIM, POWER RETURNED. RAN ENGINES. DURING SHUTDOWN ALERT RETURNED. REPLACED RT EMER AC BUSS FEED RCCB.(B1-138) AMM 24-50-01-4. SYSTEM NEEDS OPS CHECK. REMOVED AND REPLACED R2-18 RIGHT EMERGENCY TRANSFER RELAY REF MM 24-25-03-2, RAN ENGINES SEVERAL TIMES, ALL INDICATIONS NORMAL, MM SUBTASK 24-25-03-820-001.