What was found
INITIAL INSPECTION: CORROSION ON FLOOR SEAT RAILS IN SECTIONS [ FS= 349 TO FS= 485, 9RBL/LBL ] [FS485 TO FS581 9RBL][ FS= 661+32 TO FS= 847+8.40, 9LBL/9RBL ] ALSO [27LBL FS954 TO FS 985 AND 9LBL FS977 TO FS 985] AT PAX CABIN. (CPAX) (TCI: 53-20-243) FLOOR SEAT RAILS IN SECTIONS [ FS= 349 TO FS= 485, 9RBL/LBL ] [FS485 TO FS581 9RBL][ FS= 661+32 TO FS= 847+8.40, 9LBL/ 9RBL ] ALSO [27LBL FS954 TO FS 985 AND 9LBL FS977 TO FS 985] AT PAX CABIN. WERE REPLACED PER CRJ-900 AMM 53-00-49-400-801-A12.