As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE CURRENT HMV3 CHECK, THE NR 1 PYLON P/N 311N3211-1 FORWARD ENGINE MOUNT FITTING WAS FOUND WITH FRETTING CORROSION ON THE LOWER SURFACE AROUND THE MOUNT HOLES. ACCOMPLISHED PERMANENT REPAIR PER PRODUCTION PERMIT B757-54-25939PA REF ERA 457244-14.