As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - MAJOR REPAIR - DURING C-12 CHECK ELONGATED HOLES WERE FOUND ON THE # 1 ENGINE INBOARD THRUST REVERSER UPPER SUPPORT BEAM. MAINTENANCE DRILLED DAMAGED HOLES ON # 1 ENGINE INBOARD THRUST REVERSER UPPER SUPPORT BEAM TO A LARGER DIAMETER, FABRICATED 2 EACH DOUBLERS AND FREEZE PLUG BUSHINGS, AND INSTALLED REPAIR PARTS IAW AWA ER 03-7831-02200-ES4.