What was found
AFTER TAKEOFF AT V1 THE FIRE BELL SOUNDED WITH NO OTHER INDICATION INDICATING A FIRE WAS UNABLE TO SILENCE THE BELL. A/C PRFORMED ATR AND RETURNED TO THE GATE WHERE MTX GROUNDED A/C . PERF AFOLTS TEST PER AMM 26-10-00. NO DEFECTS NOTED. PERF BACU BITE CK 24-22-00. NO DEFECTS NOTED. PERF PSEU BITE CK PER FIM 32-09 FT803. MULTIPLE PROX FAILURES, INCLUDING INTERNAL CARD FAILURE (D12 CARD). REMOVED AND REPLACED PSEU PER AMM 32-09-044, OPS CK GOOD. ALL FAULTS CLEARED. DURING INSPECTION OF M1000 BELL/CHIME MODULE FOUND SHORTED/DAMAGED COMPONENTS. REMOVED AND REPLACED BELL CHIME MODULE PER AMM 31-31-04. OPS CK GOOD. PERFORMED LANDING/TO CONFIG, LEFT/RIGHT SIREN MODULE AND MASTER CAUTION AND WARNING MODULE. OPS CHECKS PER AMM 31-31-04. NO DEFECTS NOTED. A/C REMAINS NO ETOPS.