As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON REMOVAL OF A/C DIST. DUCT FOUND THE INSULATION SURROUNDING IT TO BE TORN IN MULTIPLE SPOTS, REQUIRES REPLACEMENT (C CHECK RO 12/28/2021) REPAIRED DAMAGED INSULATION IN MULTIPLE SPOTS ON ECS DUCT ASSY, PN X7339-3, IAW MHIRJ REO 601R21-20-016 REV -A DATED 2021-12-06, TEMP REPAIR VALID FOR MAXIMUM OF 6600 FH AFTER INCORPORATION OF THIS REO