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U.S. Department of Energy
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Crack detection on HU-25 Guardian aircraft

Conference ·
OSTI ID:381755
;  [1]; ; ;  [2]
  1. Sandia National Labs., Albuquerque, NM (United States)
  2. Coast Guard, Elizabeth City, NC (United States). Aircraft Repair and Supply Center
An ultrasonic inspection method was developed at FAA`s Airworthiness Assurance NDI Validation Center (AANC) to easily and rapidly detect hidden fatigue cracks in the copilot vertical windshield post on USCG (Coast Guard) HU-25 `Guardian` aircraft. The inspection procedure locates hidden cracks as small as 3.2 mm emanating from internal fastener holes and determines their length. A test procedure was developed and a baseline assessment of the USCG fleet conducted. Inspection results on 41 aircraft revealed good correlation with results made during subsequent structural disassembly and visual inspection of selected aircraft.
Research Organization:
Sandia National Labs., Albuquerque, NM (United States)
Sponsoring Organization:
USDOE, Washington, DC (United States)
DOE Contract Number:
AC04-94AL85000
OSTI ID:
381755
Report Number(s):
SAND--96-1930C; CONF-9610109--2; ON: DE96013389
Country of Publication:
United States
Language:
English

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