What was found
DURING C-18 CHECK, A 3/8 INCH CRACK WAS FOUND IN LT INBOARD SEAT TRACK BEAM AT BS 727B, LBL 24.75. MAINTENANCE TRIMMED OUT CRACK IN LT INBOARD SEAT TRACK BEAM AT BS 727B, LBL 24.75; PERFORMED A HFEC INSPECTION OF CUTOUT TO VERIFY NO CRACKS EXIST. FABRICATED A FILLER, SHIM, AND 2 EACH STRAPS; INSTALLED REPAIR PARTS IAW ER 03-5702-04293-SS2.