As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INTERCOSTAL AT STRGR 21R HAS MULTIPLE SPOTS OF CORROSION FROM FS310.00 TO FS349.00 (C-CHECK RO 7/10/2021) UPON FURTHER INVETSIGATION FOUND STR 20R INTERCOSTAL TO BE CORRODED NOT STR 21R INTERCOSTAL. REMOVED AND REPLACED INTERCOSTAL ON STG20R BETWEEN FS 310.00 AND FS 349.00 IAW CRJ 700 SRM 51-42-06-001-001-A01 AND 51-42-21-001-001-A01. COMPLETED MAJOR REPAIR TASK CARD 51-900-1002-SKY AND FORM M-337, NO WEIGHT CHANGE.