As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - MAJOR REPAIR - DURING C-05 CHECK EXFOLIATION CORROSION WAS FOUND ON UPPER SURFACE OF BILGE SKIN BETWEEN BS 988 AND BS 1005, STR 26 LT AND STR 27 RT. MAINTENANCE CUT OUT CORRODED SKIN FROM BS 988 TO BS 1005, STR 26 LT TO STR 27 RT; FABRICATED A REPAIR DOUBLER; INSTALLED REPAIR PART IAW B737-300 SRM 53-00-01 FIG 226.