As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - DURING INSPECTION OF AIRCRAFT CORROSION WAS FOUND ON FRAME BETWEEN STR 27R AND STR 26R AT BS 927. MAINTENANCE REMOVED CORROSION AND FOUND MATERIAL LOSS OUT OF LIMITS IAW B737-300 SRM 53-00-07, FIG 101, DETAIL II. REMOVED LOWER FLANGE OF FRAME AND FABRICATED REPAIR PART, INSTALLED REPAIR IAW B737-300 SRM 53-00-07, PG 219-221.