Many codes allow for the substitute of one method of stated

nondestructive evaluation (NDE) for another as long as

certain requirements are met.

On the grounds of safety alone the justification for an

alternative method of non-destructive testing was apparent.

Phased Array however is a view-able ultrasonic inspection that

has different possible views on screen in real time. Sectorial

scans, C Scans, B Scans, Conventional A scans can all be viewed

and manipulated for best interpretation. This gives you an image

from the top and also the side. This reveals the length, height, and

depth of a flaw.