As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE LT STRINGER 18A SHEAR BEAM AT FS 727 WAS FOUND WITH A 1 INCH CRACK EMANATING FROM THE EDGE OF THE WEB. THE CRACK IS TYPICAL OF THOSE SHOWN IN BAC S/B 737-53-1066, HOWEVER THE S/B IS NOT EFFECTIVE FOR THIS AIRCRAFT. THE CRACK WAS STOP DRILLED AND REPAIRED PER ER/A 381542-14, REV A.