What was found
DURING SCHEDULED INSPECTION, MULTIPLE WEB FLANGE CRACKS WERE FOUND AT AFT FUSELAGE CARRY THROUGH SPAR ASSEMBLY PN 5211173-2 AT CTR UPPER SECTION FWD & AFT WEBS. THIS DAMAGE AREA DIRECTLY CORRESPONDS TO CTR CABIN FLOORBOARD AREA & IS PRONE TO DAMAGE AS PAXS & CREWS WALK BACK & FORTH THROUGH CABIN AREA. THIS DAMAGE WILL BE REPAIRED IAW WITH REPAIR DEFINITION SUPPLIED & SUBSTANTIATED BY DER FIRM. A SUPPLEMENT TO THIS SDR HAS BEEN SUBMITTED TO FURTHER ILLUSTRATE DAMAGE POINTS.