As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FUSELAGE SKIN ASSY BELOW THE L1 DOOR CUTOUT LOWER SILL NEAR THE AFT CORNER WAS FOUND WITH A 1 INCH CRACK. THE CRACK IS TYPICAL OF BAC S/B 737-53-1083. THE CRACK WAS ROUTED OUT AND REPAIRED WITH TWO REPAIR STRAPS ON A TIME-LIMITED BASIS PER THE S/B. THE REPAIR WAS DOCUMENTED PER ER/A 369780-14.