As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MV2 VISIT THE NR 4 MIDFLAP LEADING EDGE WAS FOUND WORN AT THE IB END. THE LEADING EDGE WAS REPAIRED BY TRIMMING OUT THE WORN AREA AND INSTALLING A DOUBLER AND FILLER PER 727 MM 57-52-0,FIG. 803. THIS REPAIR WAS ACCOMPLISHED IN THE SHOP PER SO B09707.