As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RT FLOOR SILL BETWEEN FR 50 & 51 HAVE CORROSION ON UPPER SURFACE. REMOVED CORRODED FLOOR SILL BETWEEN FRAMES 48-53 AND INSTALLED NEW FLOOR SILL. HI LOKS NEED TO BE INSTALLED. INSTALLED NEW FLOOR SILL AT FRAME 48-53 INSTALLED HI LOK FASTENERS.