As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELECTRICAL BURNING SMELL EMANATING FROM LEFT SIDE COCKPIT INTERIOR FOLLOWED BY DUAL ENGINE FIRE WARNING ANNUNCIATOR. MAINTENANCE REPLACED PCB A129 (PN 5088103-1) AND CORRODED TERMINAL (PN: JTXN1202A) LOCATED ON THE BACK SIDE OF THE LEFT CIRCUIT BREAKER PANEL. RAN ENGINES AND ENVIRO SYSTEM WITH NO DEFECTS NOTED. AIRCRAFT WAS RETURNED TO SERVICE.