We have just developed a new type of eddy current inspection instrument. Microprocessor-based interactive video display, signal processing, and automatic data logging functions are combined in the NORTEC 30 EDDYSCAN. The EDDYSCAN name and the basic operating principles come from work done by Harrison of the Royal Aircraft Establishment at Farnborough, first published in 1967 [1] and recently the subject of several patents. The battery powered portable instrument uses a rotating Hall effect scanner, and other novel inspection and imaging techniques to simplify in-place inspections for fatigue cracks in aircraft skins and structures. Advantages include reduced operator interpretation, inspection of many layers simultaneously, excellent accuracy and sensitivity, speed and simplicity of operation, no surface preparation required, and most importantly, inspections are conducted with ferrous or non-ferrous fasteners left in place.