What was found
FUSELAGE SKIN CRACKED AT FRAME 75 FASTENER JUST BELOW STRINGER 2R. CRACK IS APPROX 1/4 INCH IN LENGTH. CRACK END IS MARKED. EASI 8071 USED, 400 KHZ, LPF 100, V-GAIN=76, H-GAIN=64, 50-500 KHZ PROBE. DO NOT STRIP FOR NDT. PERFORMED PERMANENT REPAIR ON FUSELAGE SKIN CRACK AT FRAME 75 FASTENER JUST BELOW STRINGER 2R IAW ERS-EM-53MR-923. SEE TURNOVER FOR DETAILS.