As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING COMPLYING EO F7120-7-5000 PT1 FIG 1 SHEET 1 STEP 7. AFTER REMOVAL OF NR 1 PYLON AFT ENG MOUNT INBD SHEAR BOLT FLANGED BUSHING, BUSHING HOLE FOUND WITH FRETTING. REPAIRED IAW EA F-5450-T0307098 PART 1. REPAIR CLASSIFIED AS MAJOR.