What was found
CENTER WING / LONGITUDINAL OVERWING FLOORBEAM / BL 24.82 / FS 678 : CHORD AND WEB CRACK REPAIR INSPECTION OF THE LBL & RBL 24.82 LONGITUDINAL FLOORBEAMS PER AD 2001-17-18 REVEALED TYPICAL CRACKS IN THE BEAM WEB, WEB DOUBLER, AND UPPER CHORD AT FS 678 AT THE AILERON CONTROL QUADRANT CUTOUT. THE CRACKS ARE TYPICAL OF BAC S/B 737-57-1139. THE UPPER CHORDS AND WEB DOUBLERS WERE REPLACED. THE WEB CRACKS WERE ROUTED OUT AND REPAIRED WITH AN ALUMINUM DOUBLER. THE WORK WAS DONE PER ER/A 382700-14AD.