As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROUTINE CPCP INSPECTION FOUND LEVEL 2 CORROSION: CORROSION ON AFT PRESS BULKHEAD LONGERON FWD PART FS1809 BEHIND S17-S18. REMOVED CORROSION IAW L1011 SRM 51-21-01. FOUND TO BE OUT OF LIMITS IAW 53-11-00 FIG 801. INSTALLED REPAIR IAW LOCKHEED L1011 SRM 53-11-00. CORROSION TASK CARD NUMBER C53-160-04-00. NON-ROUTINE TASK CARD NUMBER 14036.