What was found
INITIAL INSPECTION: CORROSION ON FLOOR SEAT RAILS IN SECTIONS [ FS= 581 TO 661+32, 9LBL ] [ FS= 661+32 TO FS= 693, 9LBL/9RBL ] AT PAX CABIN. (CPAX) (TCI: 53-20-245) "SUMMARY OF NRC: 00173 CORROSION LEVEL:2 DUE TO EXCESSIVE CORROSION ON FLOOR SEAT RAILS IN SECTIONS [ FS= 581 TO 661+32, 9LBL ] [ FS= 661+32 TO FS= 693, 9LBL/9RBL ] AT PAX CABIN MUST BE REPLACED, PER SRM 53-00-49-201-002-A01. FLOOR SEAT RAILS IN SECTIONS [ FS= 581 TO 661+32, 9LBL ] [ FS= 661+32 TO FS= 693, 9LBL/9RBL ] AT PAX CABIN WERE REPLACED PER AMM 53-00-49.