As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) PILOTS REPORTED SMOKE AROUND LT ESSENTIAL BUS AREA. OPENED J-BOX WHERE ODOR SEEMED TO BE COMING FROM. SEVERAL CURRENT LIMITER NUTS FOUND LOOSENED OFF SLIGHTLY SO TERMINALS WERE ABLE TO MOVE. NUTS WERE RE-TIGHTENED AND ENGINES WERE RUN FOR 25 MIN, AND VARIOUS ELECTRICAL LOADS WERE APPLIED. 2 BATTERY STARTS WERE DONE. NO SMOKE WAS FOUND. ACFT WAS RETURNED TO SERVICE.