What was found
CIDS FAULT DURING CRUISE WHICH CAUSED FLASHING CABIN LIGHTS, NO PA AND NO CABIN INTERPHONE. AT THE SAME TIME, A PASSENGER IN ROW 11 REPORTED AN ELECTRICAL SMELL. REMOVED AND REPLACED NR 1 CIDS DIRECTOR IAW AIRBUS MAINTENANCE MANUAL 23-73-34. INSPECTED ALL WIRING, DEUS, LIGHTS, PCBS, BALLASTS, ETC. ROWS 9-12 WITH NO DEFECTS NOTED.