What was found
"INITIAL INSPECTION: CORROSION ON SIDE SEAT RAILS IN SECTIONS [ FS= 667 TO FS= 720, STGR 15LH/RH ] AND [ FS= 744 TO FS= 761, STGR 15LH/RH ] AT PAX CABIN. (CPAX) (TCI: 53-20-318) ""CORROSION LEVEL 2. SEAT RAILS IN SECTIONS [ FS= 667 TO FS= 720, STGR 15LH/RH ] AND [ FS= 744 TO FS= 761, STGR 15LH/RH ] AT PAX CABIN WERE REPLACED PER CRJ900 AMM 53-00-49-400-801-A12 "