What was found
COCKPIT AURAL CHIME IS UNIQUELY AND OBNOXIOUSLY LOUD. REPEAT WRITE UP. AMM: 31-51-04-4 AMM: 31-51-05-4 SLAVED IN LEFT SIDE SPEAKER BUT NO HELP PER MM 31-51-05-4 SPEAKER BACK TO ORIGINAL. SWAPPED LEFT AND RIGHT SIREN/OWL MODULE CARD (M619, M999) FOR T/S BUT NO HELP. REINSTALLED BOTH CARDS ORIGINAL POSITION PER MM 31-51-04-4. INSTALLED NEW BELL/CHIME MODULE CARD M1000 AGAIN AND LEFT SPEAKER CHIME FUNCTION BACK TO NML. COMPARED WITH LEFT AND RIGHT SPEAKER CHIME VOLUME AND BOTH SAME LEVEL. PERFORMED BELL/CHIME AURAL WARNING CARD MODULE TEST AND PASS PER MM 31-51-04-4 4-F. A/C OK FOR SVC.