As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - DURING C19 CHECK DISCOVERED CORROSION ON BS 1000 TO BS 1016 FLOOR SUPPORT FROM BL 5L TO BL 10R, WL 208. MAINTENANCE REMOVED DAMAGED AREA AND FOUND CORROSION TO BE OUT OF LIMITS IAW BOEING 737-300 SRM 53-60-15-1A1 FIG 101. REMOVED AND INSTALLED NEW FLOOR SUPPORT AT BS 1000 TO BS 1016 AND FROM BL 5L TO BL 104, WL 208 IAW BOEING 737-300 SRM 51-40-02-0G FIGURES 8 AND 12.