As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WIRE HARNESS DAMAGED WITH SEVERAL BROKEN AND BURNED WIRES AT BS 740, RBL 48, ABOVE THE FORWARD LOWER CARGO BAY AFT BULKHEAD. THE BROKEN WIRES WERE SPLICED AND REPAIRED. THE ACFT WAS GROUNDED. THE PROBABLE CAUSE WAS A FASTENER IMPROPERLY INSTALLED THROUGH THE CARGO BAY CEILING DURING THE MAINTENANCE VISIT.