As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOWER CARGO FIRE WARNING SOUNDED DURING CRUISE, DURING DESCENT, WARNING EXTINGUISHED, THEN CAME ON AGAIN DOWNWIND THEN OFF AGAIN ON LANDING. CORRECTIVE ACTION: TESTED LOWER FIRE WARNING ON GRND IAW 727MM 26-16-00. OPS TEST CHECKS SERVICEABLE, NO DEFECTS NOTED. STATUS-CLOSED.