What was found
DURING C-18 CHECK, CORROSION WAS FOUND ON INBOARD FLANGE OF SEAT TRACK AT BS 480, RBL 45. MAINTENANCE CUTOUT DAMAGED SECTION OF SEAT TRACK FROM BS 334 TO BS 500 AT RBL 45; FABRICATED A NEW REPLACEMENT SEAT TRACK AND A FILLER; INSTALLED REPAIR PARTS IAW B737-300 SRM 53-00-52, FIG 202.