What was found
CORROSION ON INTERCOSTAL AT STGR. 21L BETWEEN FS 310.00 TO FS 333.00 (C-CHECK RO 8/18/2021) REMOVED CORROSION ON INTERCOSTAL AT STGR 21L BETWEEN FS310.00 AND FS333.00. REF CRJ900 SRM 51-21-06-001-001-A01. EVAL 100% MATERIAL LOSS IS OUT OF LIMITS. REMOVED AND REPLACED INTERCOSTAL AT STGR21L BETWEEN FS310.00 AND FS333.00. REF CRJ900 SRM 51-42-06-001-001-A01, CRJ900 SRM 51-42-21-001-001-A01, AND DWG SH670-31810 REV Y. PRESSURE LEAK CHECK GOOD AT THIS TIME. SEE CONTIUE CARD FOR DETAILS OF WORK PERFORMED. COMPLIED WITH TASK CARD 51-900-1002-SKY