What was found
CORROSION LOCATED AT FS333-FS349 STRINGER 21R AT TWO RIVETS. REPLACED STRINGER P/N SH670-31383-1, 21R, INSTALLED FASTENERS IAW CRJ 900 SRM 51-42-06-001-001-A01. REMOVED AND REINSTALLED STRINGER GUSSET AT STRINGER 21R / F.S 349.00, P/N SH670-32681-1, AND GUSSET CLIP, P/N SH670-41519-1 SAME LOCATION AS GUSSET, STRINGER CLIP AND STAND-OFF BETWEEN F/S 349.00 AND 364.00, BRACKET P/N SH670-96038-5 BETWEEN F.S 364.00 AND 379.00, IAW CRJ 900 SRM 51-42-06-001-A01.