PPRuNe Forums - View Single Post - United B777 engine failure

8th Mar 2021, 12:39

#258 (permalink)

iranu

Join Date: Dec 2013

Location: UK

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Dye pen can only be used on the outer surface. The method of flaw detection for internal surfaces is Thermal Acoustic Imaging (TAI). This is a P&W technique developed in 2005 for the specific purpose of finding internal fan blade cracking.

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