What was found
UPON REMOVAL FOUND LWR SILL ANGLE (P/N: SH670-31986-1) TO BE CORRODED AT UPPER FWD CORNER (BEYOND 90% MATERIAL MISSING) AND REQUIRE REPLACEMENT. REMOVED UNSERVICEABLE GALLY SERVICE DOOR LWR SILL ANGLE FROM MOUNTING ANGLE IAW CRJ 900 SRM 51-42-06-001-001-A01 & 51-42-21-001-001-A01. INSTALLED SERVICEABLE GALLY SERVICE DOOR LWR SILL ANGLE (P/N: SH670-31986-1) IAW CRJ 900 SRM 51-42-06-001-001-A01 & 51-42-21-001-001-A01.