As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DRILL MARKS WERE FOUND ON AFT PRESSURE BULKHEAD TEE LOWER SECTION STAY=1338 BTW PROJECTION OF LONGERON 29L-29R AT AFT CARGO COMPARTMENT REF MD 88 SRM 53-03 FIG 37 FOR REPAIR (NRC TO241646). NEW SECTION OF TEE AND REPAIR PARTS INSTALLED IAW DC9/MD88 SRM 53-03D FIG 37.