As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A CRACK WAS FOUND IN THE RT S18A SHEAR BEAM WEB AT BS 727. SUBJECT CRACK IS TYPICAL OF THOSE DEPICTED IN S/B 737-53-1066. THE CRACK IS LOCATED AT THE AFT, I/B MOST FASTENER LOCATION. THE SUBJECT SB IS NOT EFFECTIVE FOR AC 316. DAMAGE REPAIRED PER ERA 377513-14, REV A.