As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PAX DOOR HINGE REPLACEMENT FOUND CORROSION ON INTERCOSTAL AT STGR 21 BETWEEN STA 333.00 & STA 349.00. FILED CLOSED RO 9/4/2020. REMOVED AND REPLACED WITH SERVICEABLE INTERCOSTAL P/N 601R31527-19 AT STGR 21 LT BETWEEN STA 333.00 & STA 349.00, REF DWG, SRM.