As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A HEAVY MAINTENANCE CHECK, OUT OF LIMITS CORROSION WAS FOUND IN THE AFT CARGO BILGE AREA AT STR 29L BETWEEN STA 950E AND 950F. REMOVED AND REPLACED DAMAGED CHORD WITH NEW CHORD IAW B727 SRM 51501. CUT ACCESS HOLE TO ACCESS S29L. FABBED DOUBLER PER SRM 53303 AND INSTALLED ALL REPAIR PIECES PER B727 SRM 53303 AND 51404.