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 FUSELAGE FRAME ATTACH ANGLE AT AFT PIT BS 827, BL 13.80R AND WL 148. CORROSION WAS OUT OF LIMITS IAW BOEING 737-300 SRM 53-00-07-1A1 FIG 101. MAINTENANCE REMOVED ANGLE AND FABRICATED REPLACEMENT ANGLE IAW BOEING 737-300 SRM 53-00-07-1A1 FIG 101. INSTALLED FABRICATED REPLACEMENT PARTS AT AFT PIT BS 827, BL 13.80R AND WL 148 IAW BOEING 737-300 SRM 53-00-07-1A1 FIG 101.