As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - MAJOR REPAIR - "C" - DURING C-20 CHECK A GOUGE .015 DEEP X 3" LONG WAS FOUND ON THE #1 ENGINE AFT PYLON INBOARD SIDE SKIN JUST AFT OF THE FLIPPER DOOR. MAINTENANCE REMOVED THE AFT INBOARD SKIN, FABRICATED NEW SKIN REPAIR DOUBLER AND INSTALLED IAW AWA ER 15-5400-02036-TB1.