As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE CHECK, CORROSION WAS FOUND OUT OF LIMITS AT INTERIOR FUSELAGE STA 385 BL 18R FLOOR SUPPORT. REMOVED CORROSION IAW B727 511006. REMOVED FLOOR SUPPORT FROM BS 385 RBL 18 PER SRM 513002. FABRICATED NEW SUPPORT FROM BAC 15064417 PER SAMPLE. TREATED PER SRM 511002. PRIMED PER MM 512002. INSTALLED PER MM 513002.