As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE ACCOMPLISHMENT OF EO737-53-0388_P1 WAS FOUND IN THE LOWER FUSELAGE RH STA 727 FRAME INNER CHORD AND S-18A WEB AT LOWER OPEN FASTENERS HOLE WITH CRACK INDICATION. DUE TO IT, THE PART WAS REPLACED IAW NAC ENGINEERING ORDER #737-53-0403 REV. IR. UNDERJOB A1Q187 NRI 1-76