What was found
31J - DURING A SCHEDULED INSPECTION, THE FOLLOWING WAS FOUND, CABIN SEAT TRACK LEFT INBOARD HAS HOLES DRILLED IN TOP THROUGH OUT, REMOVED AND INSTALLED SEAT TRACK AT STATIONS 480-520, 727-727B, 520-540 IAW SRM 51-10-3. REMOVED, FABRICATED AND INSTALLED SEAT TRACK FROM STATION 727B-887.