Several ultrasonic inspection methods were developed at the Federal Aviation Administration's Airworthiness Assurance NDI Validation Center (AANC) to easily and rapidly detect hidden stress corrosion cracks in all vertical windshield posts on the US Coast Guard (USCG) HU-25 Guardian aircraft. The inspection procedure locates cracks as small as 2.0 millimeters emanating from internal fastener holes and determines their length. A test procedure was developed and a baseline assessment of the USCG fleet was conducted. Inspection results on twenty-five aircraft revealed a good correlation with results made during subsequent structural disassembly and visual inspection.
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Sandia National Labs., Albuquerque, NM, and Livermore, CA (United States)
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Albuquerque, New Mexico
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Several ultrasonic inspection methods were developed at the Federal Aviation Administration's Airworthiness Assurance NDI Validation Center (AANC) to easily and rapidly detect hidden stress corrosion cracks in all vertical windshield posts on the US Coast Guard (USCG) HU-25 Guardian aircraft. The inspection procedure locates cracks as small as 2.0 millimeters emanating from internal fastener holes and determines their length. A test procedure was developed and a baseline assessment of the USCG fleet was conducted. Inspection results on twenty-five aircraft revealed a good correlation with results made during subsequent structural disassembly and visual inspection.
1999 ASNT (American Society for Nondestructive Testing) Spring Conference and Eighth Annual Research Symposium, Orlando, FL (US), 03/22/1999--03/26/1999
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Blackmon, R.; Huffman, J.; Mello, C.W.; Moore, D.G. & Walkington, P.D.Stress Corrosion Crack Detection on HU-25 Guardian Aircraft,
article,
February 17, 1999;
Albuquerque, New Mexico.
(https://digital.library.unt.edu/ark:/67531/metadc688052/:
accessed May 20, 2019),
University of North Texas Libraries, Digital Library, https://digital.library.unt.edu;
crediting UNT Libraries Government Documents Department.
