As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) MAINTENANCE PERSONNEL FOUND EVIDENCE OF BURNED WIRES IN JB-5. THESE BURNED WIRES WERE DISCOVERED BY MAINTENANCE WHILE CARRYING OUT INSTRUCTIONS FROM TECH SERVICES VIA A JOB CARD. R/R RELAY K15PA, APU BATT CHG MSG NO LONGER PRESENT AFTER JB5 AND AIRFRAME WIRING REPAIR COMPLETED. (TC# 20191021022)