As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EQUIP BAY SMOKE WARNING CAME ON APPROX 2 MINUTES AFTER TAKEOFF. NO INDICATIONS OF SMOKE WITH SNIFFER FAN. ECAM WARNING WENT OUT AFTER APPROX 4 MINUTES. CREW NOTED FAULT WENT AWAY WHILE RETURNING TO AFW. SUSPECT WATER ACCUMULATION IN E&E. INSPECTED AVIONICS COMPARTMENT FOR WATER PER AMM 05-50-01-00, NONE FOUND. PRECAUTIONARY REMOVED AND REPLACED 12WA MIN EQUIPMENT BAY SMOKE DETECTOR, OPS CHECKS GOOD PER AMM 26-15-02-01 AND 26-15-00-5.OK FOR SERVICE.