As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE INSPECTION OF STRUCTURE BETWEEN STATION 2220 THROUGH 2360, THE INSULATION BLANKETS ON THE APU PNEUMATIC SUPPLY DUCT WERE FOUND WITH BURNED HOLES. THE P/N OF THE DAMAGED BLANKETS WERE CHECKED FOR CORRECT APPLICATION. THE CORRECT P/N WAS INSTALLED. ALL INSULATION BLANKETS WERE REPLACED. OPS CHECK AND LEAK CHECK PERFORMED. ALL OK. (M)