What was found
DURING C-11 CHECK CORROSION WAS FOUND ON FLOORBEAM NUTPLATE HOLE AT BS 1340 RT, JUST INBOARD OF THE R-3 DOOR. MAINTENANCE REMOVED INBOARD CHORD RT FROM BS 1300 TO BS 1400, FABRICATED NEW REPAIR CHORD, AND INSTALLED REPAIR IAW B757-200 SRM 53-60-13.