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 THE TOP AND BOTTOM SURFACE ON TRANSVERSE BEAM FROM BL 19L TO BL 19R, WL 208 AND BS 986. CORROSION WAS FOUND TO BE OUT O LIMITS IAW BOEING 737-300 SRM 53-60-51-1A1 FIG 101. MAINTENANCE REPAIRED BEAM FROM BL 19L TO BL 19R, WL 208 AND BS 986 IAW BOEING 737-300 SRM 53-60-51 FIG 201.