As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN DECK FIRE WARNING ACTIVATED MULTIPLE TIMES DURING CRUISE FLIGHT. VERIFIED NO FIRE OR SMOKE OBSERVED ON MAIN DECK. R & R CARD A6 IAW AMM 26-10-01. R & R SMOKE DETECTORS 16B1, 16B2 11A1 AND 15B2 IAW AMM 26-14-01. SYSTEM CHECKS GOOD.