Introduction to Phased Array Testing of Composites Phased array ultrasonic testing (PAUT) of aerospace composites during the fabrication stage is an important quality control step to assure that composite structures do not contain delaminations, fiber Phased Array Inspection of Aerospace Compositesdefects, interlayer bonding issues, voids and ply cracking. Phased array testing of composites is comparably more challenging that testing metals due to the material anisotropy, hig