What was found
INITIAL INSPECTION: CORROSION ON SEAT SIDE RAIL SECTIONS FS485 TO FS565, FS565 TO 661+16, FS 661+16 TO FS661+90 LH SIDE ALSO FS661 TO FS661+16,FS661+16 TO FS661+90 SECTION RH SIDE AT PASSENGER CABIN. (SM) (CPAX) (TCI 53-20-301) SEAT SIDE RAIL SECTIONS FS485 TO FS565, FS565 TO 661+16, FS 661+16 TO FS661+90 LH SIDE ALSO FS661 TO FS661+16,FS661+16 TO FS661+90 SECTION RH SIDE AT PASSENGER CABIN WERE REPLACED PER CRJ-900 AMM 53-00-49-400-801-A12.