What was found
INTERCOSTAL LOWER FLANGE CORRODED FS 394.00-FS 421.00, BETWEEN STGR 27 & STGR 26R, MARKED. C-CHECK RO 12/14/2020. REMOVED AND INSTALLED NEW INTERCOSTAL AT FS 394.00-FS 421.00, BETWEEN STGR 27 & STGR 26R, REF CRJ 700 SRM DWG. COMPLIED WITH TASK CARD. PRESSURE CHECK GOOD.