What was found
MAIN AVIONICS BAY FS319.70 FRAME CORRODED AT STR 21L (C-CHECK RO 6/22/2021) CORROSION ON FRAME AT FS319.70 AT STGR 21L FOUND TO BE OUT OF LIMITS REF. CRJ-900 SRM, 53-21-23-101-001-A02. REMOVED AND REPLACED FS319.70 FRAME AT STGR 21L REF. CRJ-900 SRM, 51-42-06-001-001-A01, CRJ-900 SRM, 51-42-21-001-001-A01 AND DWG SH670-31810 REV Y. COMPLIED WITH TASK CARD 51-900-1002-SKY, PRESSURE CHECKS GOOD.