As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT GROUNDED FOR HEAVY MAINTENANCE. AFT LOWER CARGO STRINGER 36L IS CORRODED AT LOWER SURFACE BETWEEN STATION 1263-1285. REMOVED CORRODED SECTION OF STRINGER 36L AT STATION 1250-1300 AND REPLACED WITH FILLER STRINGER AND SPLICE IN ACCORDANCE WITH SRM 53-00-03.