As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
"WHILE PERFORMING ENDEAVOR EO# R25120 FOUND INTERCOSTAL CORRODED AT STR21L BETWEEN FS 319.70 AND FS 333.00. " "REMOVED AND REPLACED INTERCOSTAL AT STR 21L BETWEEN FS 319.70 AND FS 333.00 IAW CRJ 900 SRM 51-42-06-001-001-A01, 51-42-21-001-001-A01 AND51-40-11-001-001-A01. WVAC STAMP "