As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAVATORY AND CARGO SMOKE DETETECTOR FAULT DISPLAYED ON UPPER ECAM SCREEN. RESET, NO HELP. PER FM REPLACED SDCU. MAINTENANCE STATUS MESSAGE SDCU DISPLAYED ON THE LOWER ECAM SCREEN. CHANNEL 1 INOPERATIVE, REPLACED SDCU PER MM, CHECKED OKAY.