As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(LOG 0778916) CORROSION ON PREVIOUS REPAIR FLOOR BEAM UPPER CHORD STA 986.5 FROM 48RBL TO 48LBL AT PASSENGER CABIN. FLOOR BEAM UPPER CHORD STA 986.5 FROM 48RBL TO 48LBL AT PASSENGER CABIN WAS REPAIRED PER B737-800 SRM 53-70-51-2R REPAIR 4.