Many of today’s eddy current units have color screens along with
memory to store and create eddy current reports and another
feature are units having detachable probes. Most equipment is
very portable for work on and around aircraft structures. Eddy
current array (ECA) is a nondestructive testing technique that
provides the ability to electronically drive multiple eddy
current coils, which are placed side by side in the same probe
assembly. Each individual eddy current coil in the probe
produces a signal relative to the phase and amplitude of the
structure below it. This data is referenced to an encoded
position and time, and represented graphically as a C-scan
image. Most conventional eddy current flaw detection techniques
can be reproduced with ECA inspections; however, the remarkable
advantages of ECA technology allows improved inspection
capabilities and significant time savings. Eddy current array
technology includes the following advantages: - A larger area on
the aircraft can be scanned in a single-pro