As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU HAD MULTIPLE SHUTDOWNS. REPLACED FLEXIBLE SURGE DUCT, APU OPS CHECK GOOD. FOUND TO INSULATION BLANKET BAD, ALSO UNDER AFT MOUNT. NEED TO PULL APU TO REPLACE. OPS 1. DROP APU REPLACED TOP AND SIDE INSUL BLANKETS 107441 PCN 295-1005, 295-6040 AND REINSTALL. EST 2 SHIFT. OPS 2 FASTENER REPLACE APU AND DUE FIELD REPAIR ON BLANKETS. REPLACED APU.