What was found
STRINGER, STGR 23LT FROM FS 1089 TO FS 1069 AND FS 1047 TO FS 1015 HAS CORROSION, MARKED. C-CHECK RO 1/5/2021. REMOVED CORROSION FROM STR 23L FROM FSTA 1015 TO FSTA 1089, REF CRJ700 SRM 51-21-06-001-001-A01. EVALUATED DAMAGE REMOVAL FROM STR 23L FROM FS 1015.00 TO FS 1089.00. ORG THICKNESS OF STR 23L 0.100", REF MHIRJ DWG MM670-35151 REV J. MATERIAL REMOVED 0.040". REMAINING MATERIAL 0.060 (SEE NDT REPORT ITEM#3). STR 23L FOUND TO BE OUT OF LIMITS (MORE THAN 10% MATERIAL LOSS), IAW CRJ700 SRM 53-61-03-101-003-A01. REMOVED AND INSTALLED NEW STRINGER 23L FROM FS 980 TO FS 1098.20 ONLY RIVETS COMMON TO SKIN, PER BOMBARDIER DWG MM670-35151 REV J AND CRJ 700 SRM 51-42-06-001-001-A01. NO LEAKS NOTED. COMPLIED WITH 51-900-1002-SKY.