What was found
CORROSION ON FLOOR SEAT RAILS BTW FS 881 TO FS 913, BTW FS 661+16 TO FS 720, BTW FS 661 TO 549 & BTW FS 379 TO 548 AT LBL 9 PASSENGER CABIN. CORROSION ON FLOOR SEAT RAILS BTW FS 881 TO FS 913, BTW FS 661+16 TO FS 720, BTW FS 661 TO 549 & BTW FS 379 TO 548 AT LBL 9 PASSENGER CABIN WAS REMOVED AND EVALUATED, THEREFORE ARE OUT OF LIMITS. FLOOR SEAT RAILS WERE REPLACED CRJ-900 AMM 53-00-49-000-801 AND AMM 53-00-49-400-801.