As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LCQ - MAJOR REPAIR - DURING C-18 CHECK A .375 INCH CRACK WAS FOUND IN STRINGER 16 RT AT BS 500C+15. MAINTENANCE CUTOUT DAMAGED SECTION OF STRINGER 16 RT AT BS 500C+15, FABRICATED A NEW REPLACEMENT SECTION OF STRINGER AND A STRINGER SPLICE; INSTALLED REPAIR PARTS IAW B737-300 SRM 53-00-03-2 FIG 201.