What was found
RT FUSELAGE UPPER SKIN CRACKED JUST AFT OF FRAME 75 AND ABOVE STRINGER 2R, CRACK ENDS MARKED, APPROX. 1/2" LONG. EASI #6581 USED. 100-500 KHZ PROBE, FREQ=400KHZ, V-GAIN=77.0, H-GAIN=65.0, LPF=100, ANGLE=134. C/A-COMPLETE:ACCOMPLISHED REPAIR OF CRACKED SKIN AT FR75 ABOVE STRINGER 2R IAW SRM 53-31-01.