As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ECAM SMOKE INDICATION FORWARD CARGO COMPARTMENT AFTER 1.5 HOURS OF FLIGHT. MECHANIC ON BOARD CHECKED CARGO COMPARTMENT FOR HEAT AND SMOKE. NO INDICATION OF FIRE OR SMOKE. INDICATION LASTED ABOUT 4 MINUTES THEN STOPPED. SYSTEM TEST CARRIED OUT NORMAL AND REMAINDER OF FLIGHT UNEVENTFUL. NO REOCCURRENCE OF PROBLEM.