What was found
FIRE WARNING BELL CAME ON AT ROTATION. NO OTHER INDICATIONS. BELL WILL NOT SILENCE EVEN AFTER BLOCK IN AND ENGINES SHUTDOWN. MDIS 31-50 1103. REF. FIM 31-51 TASK 801, DID A WEU BITE & RESET.TEST NORMAL IAW AMM 31-51-00-5, PERFORMED FIRE BELL WARNING SIGNALS TEST. TEST NORMAL INSPECTED BELL/CHIME MODULE M1000 IN P51. PAID ATTENTION TO CONDITION OF CONNECTORS & PINS. MADE SURE CARD WAS PROPERLY SEATED IAW AMM 31-51-04. INSPECTED NORMAL. REPLACED BELL/CHIME MODULE M1000 IAW AMM 31-51-04-4. MADE SURE THE CARD IS PROPERLY SEATED IAW AMM 31-51-04-4. PERFORMED BELL/CHIME AURAL WARNING CARD MODULE TEST, TESTED NORMAL IAW AMM 26-14-00-5. PERFORMED MDCC SMOKE DETECTOR SAMPLING TUBES & SAMPLING TRUNK TUBE ORIFICES OPS TEST, TESTED NORMAL. REF AMM26-21-02-2 REPLACED THE ENGINE FIRE CONTROL PANEL. REF AMM26-21-01-716-001 DID ENGINE FIRE SWITCH OPS CHECK, RESULT :TEST NORMAL. REF AMM26-21-02-2 DID ENGINE FIRE CONTROL PANEL INSTALLATION TEST, RESULT :TEST NORMAL REF AMM26-11-01-4. REPLACED THE FIRE/OVERHEAT TEST PANEL. REF AMM26-11-01-4. DID INSTALLATION TEST, TESTED NORMAL. REF AMM31-51-04-4 REPLACED THE T/O CONFIGURATION WARNING MODULE IAW AMM31-51-04-4. DID TEST , TEST NORMAL. REF AMM32-09-02-2. REPLACED THE RELAY K219, TEST NORMAL. RESTORE AC TO SERVICE. ORIGINAL SUBMISSION DATE: 7/16/2024