What was found
IN MAIN CABIN, AT FS549, UNDERR STR17L, BELOW L/H SILL, FRAME HAS AREAS OF CORROSION. (MARKED) (C-CHECK RO 4/25/2022) REPAIRED FRAME AT FS549 STGR 18L-16L REF REO 690-53-31-628 REV.-- DATED 2022-03-01, CRJ900 SRM 51-42-21-001-001-A01 AND CRJ900 SRM 51-42-06-001-001-A01, DWG SH690-33100 REV.N AND DWG SH690-32170 REV.AD AND CRJ900 SRM 53-00-06-201-001-A03. COMPLIED WITH 51-900-1002-SKY. LEAK CHECK GOOD.