As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C1-12 CHECK INSPECTION, FOUND NR 4 PYLON I/B LWR SKIN AND INNER CHAFE STRIP DAMAGED FWD AND AFT OF AFT ENG MOUNT. REPAIRED DAMAGE SKIN AREA IAW B747 SRM 54-30-03. REPLACED CHAFE STRIP IAW SRM 51-10-01, 54-30-02 AND 51-30-02, (2024-T3). C CHECK WORK CARD NUMBER 7CI4809. NON-ROUTINE TASK CARD NUMBER 107884.