What was found
STRINGER 21R CORRODED ON UPPER SURFACE OF ATTACHED FLANGE BETWEEN FS597.00 AND FS613.00. NO DAMAGE ALLOWED ON STR 21R BETWEEN FS 597 AND FS 613, IAW CRJ-900 SRM 53-31-03-101-003-A04, STRINGER STR21R P/N: SH690-33211-3 MUST BE REPAIR OR REPLACEMENT. FABRICATED, LOCATED AND DRILLED NEW SECTION STRINGER STR21R WITH S-MATERIAL P/N B0530020BF, PO# 5-8708 BETWEEN FS581TO FS629, IAW CRJ-900 SRM 51-40-11-001-001-A01. REMOVED SECTION STRINGER STR21R BETWEEN FS581 TO FS629, IAW CRJ-900 SRM 51-42-06-001-001-A01. INSTALLED SECTION STRINGER STR21R BETWEEN FS581 TO FS629, IAW CRJ-900 SRM 51-42-06-001-001-A01. PERFORM PERMANENT REPAIR ON STR21R BETWEEN FS581 TO FS629. COMPLETED PERMANENT REPAIR ON STR21R BETWEEN FS581 TO FS629, IAW CRJ-900 SRM 53-00-03-201-001-A02.