As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON GROUND AT GATE WITH FWD CARGO PIT EMPTY THE FWD CARGO FIRE LIGHT & BELL ILLUMINATED SOUNDED. CONDITION RECURS AFTER SILENCING BELL LIGHT. BOTH A&B LOOPS TEST OK. UNABLE TO DUPLICATE DISCREPANCY. CLEANED ALL FWD CARGO PIT SMOKE DETECTORS PRECAUTIONARY. OP CHECKS NORMAL.