As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - DURING C18 CHECK DISCOVERED FRAME ANGLE CRACKED, .375 INCHES IN LENGTH, AT BS 500D AND STR 13L. MAINTENANCE REMOVED FRAME ANGLE FROM STR 11L TO STR 13L AND BS 500D IAW BOEING 737-300 SRM 51-40-02-0G. FABRICATED REPLACEMENT FRAME ANGLE IAW BOEING DRAWING 69-73057. INSTALLED FRAME ANGLE FROM STR 11L TO STR 13L AND BS 500D IAW BOEING 737-300 SRM 51-40-02-0G.