Internal and external defects in all sort of materials.

Automated immersion system (11 axis, 1m3, pulse echo or through transmission, turntable, rotator, ability to perform contour following)
Contact ultrasonic testing (standard, TOFD)
Fokker Bond tester
Olympus Bondmaster
Phased array
For example : Looking for unbonded zone in composites or defect detection in fatigue sensitive parts