As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE RT STRINGER 18A SHEAR BEAM WAS FOUND WITH A WEB CRACK AT FS 727. THE CRACK IS TYPICAL OF THOSE FOUND IN BAC S/B 737-53-1066, HOWEVER THE S/B IS NOT EFFECTIVE FOR THIS AIRCRAFT. THE CRACK WAS STOP DRILLED AND REPAIRED WITH A STEEL REPAIR CHANNEL PER ER/A 380238-14, REV A.