Abstract: Non-destructive testing scanner devices are disclosed to enable examination of portions of a part to be examined that presently-available scanners are not designed for. A scanner may include a central shaft having an assembly of engagement members adapted to engage an inner bore of a part and thereby support the central shaft along a central axis of the bore. An encoder may be supported by the central shaft. An ultrasonic probe may also be supported by the central shaft. The probe may be positioned on a surface of the part to be examined and moved in a circular path around the central shaft, and in so doing may cause a drive shaft on the encoder to rotate. The probe and encoder may be electrically connected to an instrument to convey data from the probe and from the encoder representative of characteristics of the surface being examined to the instrument.