As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE, L4 DOOR AFT CORNER FITTING CORRODED DAMAGE FOUND DURING REMOVAL OF L4 DOOR GIRT BAR FITTING PLATES AT FR 66-68; L4 DOOR NEW AFT CORNER FITTING INSTALLED IAW A321 SRM 51-42-11 REV 129. REF. LHT NR 005000917786-0020. CLASSIFIED AS A MAJOR REPAIR.