What was found
RIGHT AFT FUSELAGE FRAME 75, BELOW STRINGER 2 SKIN CRACKED AT FASTENER MARKED, SETTINGS 400KHZ 135 V-65.0 H-75.0 FILTER LO 100. CRACKED FUSELAGE SKIN AT FRAME 75, STRINGER 2R AREA WILL BE CUT OUT & REPAIRED WITH FILLER & DOUBLER, SEE NRTC E487295 FOR ACCOMPLISHMENT OF REPAIR.