What was found
CORROSION ON FLOOR SEAT RAILS LBL9 & RBL9 BTW FS 691-836, 836-847+51, 847+51-977. (SM)(CPAX)(TCI 100-20). SUMMARY: ON NRC: 00165, FLOOR SEAT RAILS LBL9 & RBL9 BTW FS 691-836, 836-847+51, 847+51-977. WERE REPLACED PER CRJ/900 AMM 53-00-49-400-801 (CONFIG. A-12) AND SRM 51-41-02-001-001-A01.