What was found
RIGHT AFT FUSELAGE FRAME 75 SKIN CRACK BELOW STRINGER 2 AT FASTENER. EQUIP SETTINGS, 400KHZ, ANGLE 130, H-GAIN 75.0, V-GAIN 85.0, PROBE MID DRIVE, LP FILTER 100. REPAIRED RT AFT FUSELAGE IAW ERS-EM-53MR-1406. SEE NRTC E454619 FOR REPAIR DETAILS.