What was found
CORROSION DETECTED ON "INTERCOSTAL ATTACHED TO STGR (21R), BETWEEN F..S. 865.00 AND 881.00 (MARKED). (C-CHECK RO 7/7/2021) EVALUATED CORROSION ON INTERCOSTAL PN SH690-37121-1 ATTACHED TO STRINGER 21R FS865.00 TO 881.00 FOUND TO BE BEYOND ALLOWABLE LIMITS REF. CRJ900 SRM 53-00-00-101-001-A01. MORE THAN 30 PERCENT OF OVERALL LENGTH OF MEMBER IS DAMAGED. / INSTALLED FABRICATED INTERCOSTAL ATTACHED TO STGR 21R BETWEEN FS 865.00 AND FS 881.00 IAW CRJ900 SRM 51-42-06-001-001-A01 AND BOMBARDIER INC, CANADAIR DWG NO. SH690-37060 REV Y / WEIGHT REMOVED 0.24 LBS, WEIGHT ADDED 0.25 LBS, TOTAL WEIGHT CHANGE 0.01 LB. C-ID: TUC1755 CAL DUE: 30-SEP-21. / COMPLIED WITH ST 51-900-1002-SKY (CL600-2D24) STRUCTURAL MAJOR REPAIR (RII)