As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RECEIVED CARGO SMOKE ALERT MSG. "AFTER ECAM ITEMS" STATUS BECAME LAND ASAP. MEM WAS CLOSE. LANDED MEM. DEFERRED MAIN DECK SMOKE DETECTOR SYSTEM MID1/ LOOP B IAW MEL 26-17-01 01-1, CONTROL NR M421063 ASSIGNED, PLACARD INSTALLED. T/S WITH REFERENCE TO TSM 26-14-00 PG 103. REPLACED MAIN DECK DETECTION CONTROL UNIT (50WU1) PRECAUTIONARY WITH REFERNCE TO MM 26-19-34-04. OPS CHECK OK. CLEARED M421063 AND REMOVED PLACARD.