As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPPER FUSELAGE FLOOR SUPPORT AT STA 986.5 TO STA 1006 AND LBL20 HAVE CORROSION. REMOVED CORRODED FLOOR SUPPORT SECTION FROM STA 986-1006. FABRICATED NEW SECTION FROM EXTRUSION AND 10140-1204, TREATED, PRIMED AND INSTALLED PER B737 SRM 51-30-2, 51-10-2.