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-18 CHECK 4 EACH CRACKS WERE FOUND ON STRINGER 8 LT AT BS 380. MAINTENANCE PERFORMED HFEC INSPECTION OF CRACKS TO VERIFY CRACK ENDS; STOP DRILLED 4 EA CRACKS ON STRINGER 8 LT AT BS 380; PERFORMED HFEC INSPECTION TO VERIFY CRACKS ARE CONTAINED; FABRICATED A REPAIR CHANNEL; INSTALLED REPAIR PART IAW B737-300 SRM 53-00-03, FIG 204, PG 217-219.