What was found
CENTER FUSELAGE DIGITAL PLATE IS CRACKED ON THE LEFT OMEGA FLOOR BEAM NEAR THE MAIN CABIN DOOR (IN-LINE WITH FRAME 21). ACTION TAKEN: PERFORMED HFEC OF AREA SURROUNDING THE CRACK INCLUDING THE OTHER SIDE OF THE NUT-PLATE THE CRACK ENDS AT. NO FURTHER DAMAGE DETECTED ON EITHER SIDE OF THE CRACK AND IT DOES NOT EXTEND BEYOND THE NUT-PLATE. AFTER CLEANING AND PREPARING THEY PERFORMED A 2ND HFEC AND FOUND CRACK TO EXTEND BEYOND THE NUT-PLATE HOLE BY .25". REPAIRED IAW EO1-53-20-0392. SEE EO AND ASSOCIATED HA-300'S FOR WORK PERFORMED.