What was found
IN MAIN CABIN, AT FS533, UNDER STR17L, BELOW L/H SILL, FRAME HAS AREAS OF CORROSION. (MARKED) (C-CHECK RO 4/25/2022) REPLACED FRAME SECTOR, FRAME SPLICE ANGLE, STRINGER CLEAT REF REO 690-53-31-628 REV.-- DATED 2022-03-01 AND DWG SH690-33100 REV. N, CRJ900 SRM 53-00-06-201-001-A03. COMPLIED WITH 51-900-1002-SKY. LEAK CHECK GOOD.