As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:N/A DURING NR 1 ENG RUN TO T/S EPR PROBLEM SMOKE AND SPARKS APPEARED AT THE LT WHEEL WELL AREA. FOUND BEHIND LT WING TRAILING EDGE ACCESS PANELS WIRE BUNDLE BURNED. ALL AFFECTED WIRED TO BE REPLACED, REFER TO NRC 268256.