As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER FLT 319 CUN-BWI, DURING "DAILY CHECK", ECAM MESSAGE SHOWED SMOKE DETECTOR IN LAV D WAS FAULTED. REMOVED AND REPLACED LAV D SMOKE DETECTOR IAW AMM 27-17-15-401. OPS CK'D IAW AMM 26-17-00-710-001 WITH NO FAULTS. AIRCRAFT RETURNED TO SERVICE.