As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO COMPARTMENT L21L AFT END CAP HAS CORROSION. REMOVED L21R END CAP STA 1167 IAW DC9 SRM 51-30-2. CORROSION FOUND TO BE OUT OF LIMITS IAW DC9 SRM 53-01 FIG 1. DRILLED NEW END CAP IAW DC9 SRM 51-10-4 AND INSTALLED IAW DC9 SRM 51-30-2.