What was found
YWG - MAJOR REPAIR - C - DURING C-02 CHECK MAINTENANCE FOUND CORROSION AT NR 4 SEAT TRACK BS FRAME 20, RBL 765. REMOVED, FABRICATED AND INSTALLED 8 INCH SECTION OF TRACK 4 INCHES FORWARD TO 4 INCHES AFT OF FRAME 20, RBL 765 IAW SRM 53-00-15, FIG 201, PG 202-206.