As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE MLG BEAM OUTBOARD AFT ATTACH FITTING WAS FOUND WITH A TYPICAL CRACK EMANATING FROM AN ATTACHMENT HOLE COMMON TO THE REAR SPAR UPPER CHORD. BOLT HOLE HFEC INSPECTION REVEALED A CRACK IN THE SPAR WEB AT THE FASTENER LOCATION. THE HOLE WAS OVERSIZED TO REMOVE THE CRACK IN THE WEB AND AN OVERSIZE BOLT INSTALLED. THE CRACK IS TYPICAL OF S/B 737-57-126. THE REPAIR IS TIME LIMITED PER ER/A 378947-14.