Originally Posted by
vettefrc2000
http://rgl.faa.gov/Regulatory_and_Gu...LE/ac145-6.pdf
a. Damage Assessment and Teardown....
Due to the tendency of composites to rebound and mask any impact damage, and the strong likelihood of non-visible microcracking, a visual inspection or coin tap test for determination of the extent
of any composite damage should be supplemented with additional NDI techniques ( i.e.,
ultrasonic or other approved NDI methods)
Oh Dear Lord,
That's SOP from the FAA? Do I have to watch out for guys walking around under the plane with a quarter on my next flight? Fantastic.