What was found
471 20103 330500 MFG 427-680-100 3 HRS LH UPPER FLOOR SKIN AND SILL HAVE NUMEROUS AREAS OF CORROSION BETWEEN FS339-FS259. ***** AIRCRAFT REMOVED FROM SERVICE ***** REMOVED AND REPLACED 1EA CLEAT P/N 601R31527-176, 1EA BRACKET ASSY P/N 601R31527-217 ON PASSENGER DOOR SURROUND STRUCTURE AT FS333+8 LBL42 AND 1EA ANGLE SUPPORT P/N 601R38673-43 ON LH FLOOR STRUCTURE AT FS349 LBL36 TO LBL42 AND RESTORED ALL FINISHES IAW CRJ200 SRM 51-42-06, 51-42-13, AND 51-42-20 PERFORMED HFEC WITH NO INDICATIONS.