As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - DURING C24 CHECK DISCOVERED LEVEL 2 CORROSION ON FLOOR FRAME, LOWER ATTACH AND FORWARD SIDE AT BS 727C AND STR 26L. MAINTENANCE CUT OUT DAMAGED PORTION OF FRAME IAW BOEING 737-300 SRM 53-00-07-2R7 FIG 201. FABRICATED REPAIR FILLER AND SHEAR TIE IAW BOEING 737-300 SRM 53-00-07-2R7. INSTALLED FABRICATED REPAIR PARTS ON THE FLOOR FRAME, LOWER ATTACH AT BS 727C AND STR 26L.