As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE SKIN AT THE COOLING DUCT CUTOUT, BS 379, LBL 2 WAS FOUND CRACKED AT THE AFT EDGE OF THE CUTOUT INTO A FASTENER HOLE. THE CRACK IS APPROXIMATELY 1.5 INCHES IN LENGTH AND IS TYPICAL OF CRACKS DESCRIBED IN BOEING S/B 737-53-1117, REV 1. A PERMANENT REPAIR WILL BE INSTALLED PER THE BOEING S/B.