As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SKIN, STRINGER AND FRAME HEAT DAMAGE FROM FS 516.5 TO 540. STR 26 TO 28. SUPPLEMENTAL DATA UPDATE - MIX MUFF DUCT OF DUCT ASSEMBLY LOCATED IN MIX CHAMBER AIR DISTRIBUTION BAY AT APPROXIMATE STA 540, BL 0 BLOWN CAUSING HOT AIR TO ESCAPE AND DAMAGE THE STRUCTURE BENEATH. MAJOR REPAIR ACCOMPLISHED.