What was found
STGR 21L IS CORRODED AT F.S. 379 UPON FURTHER INVESTIGATION FOUND ADDITIONAL DAMAGE ON THE JOINT ANGLE AT FS364 STR 21L, (FS 379 STR 21L) AFT AND JOINT ANGLE. REMOVED AND REPLACED 3EA RIVETS TO GAIN ACCESS TO CORROSION IAW CRJ700 SRM 51-42-06-001-001-A01. EVALUATED STR 21L AFT AND JOINT ANGLE AND FOUND TO BE OUT OF LIMIT DUE TO HAS A 100% OF LOSS MATERIAL IAW CRJ-700 SRM 53-21-03-101-001-A01. REMOVED AND REINSTALLED BONDING WIRE GUSSET, FOR GAIN ACCESS, AT STR21L BETWEEN FS364 TO FS379, IAW CRJ-700 SRM 515-42-06-001-001-A01. REMOVED AND REPLACED JOINT ANGLE P/N: SH670-31384-5, AT STR21L BETWEEN FS364 TO FS379, IAW CRJ-700 SRM 51-42-06-001-001-A01. LOCATED AND DRILLED NEW JOINT ANGLE P/N: SH670-31384-5, AT STR21