What was found
* L/H SIDE STR 21 FS 333.0 TO FS 364.0 INTERCOSTAL HAS CORROSION (C-CHECK RO 10/30/2021) REMOVED AND INSTALLED NEW INTERCOSTAL ON STGR 21L BETWEEN FS333.00 AND FS349.00 REF CRJ700 SRM 51-42-06-001-001-A01 AND DWG SH670-31810 REV-Y. COMPLIED WITH TASK CARD 51-900-1002-SKY. PRESSURE CHECK GOOD. / INSPECTED INTERCOSTAL STR 21L FROM FS349-FS364 FOUND NO CORROSION ON INTERCOSTAL STG 21L BETWEEN FS FS349-FS364. CORROSION WAS ONLY ON INTERCOSTAL ON STGR 21L BETWEEN FS333.00 AND FS349.00 / ACARS SYSTEM OPERATIONAL TEST GOOD.