Method and assembly for inspecting engine component

Abstract

One exemplary embodiment of this disclosure relates to a method of inspecting a component of a gas turbine engine. The method includes performing a through-hole inspection, and determining a location of the plurality of holes from results of the through-hole inspection.

What is claimed is: 
     
         1 . A method of inspecting a component of a gas turbine engine, comprising:
 performing a through-hole inspection; and   determining a location of the plurality of holes from results of the through-hole inspection.   
     
     
         2 . The method as recited in  claim 1 , wherein the through-hole inspection includes a flow thermography process. 
     
     
         3 . The method as recited in  claim 2 , wherein the flow thermography process includes providing a flow of fluid within the component and taking a thermal image of the plurality of holes as the fluid exits the plurality of holes. 
     
     
         4 . The method as recited in  claim 3 , wherein taking the thermal image includes taking a thermal video of the fluid exiting the plurality of holes. 
     
     
         5 . The method as recited in  claim 1 , wherein the results of the through-hole inspection include a plurality pixels, and wherein a blockage is identified when a number of pixels within an acceptable hole location is below a minimum threshold. 
     
     
         6 . The method as recited in  claim 5 , wherein a hole is determined to not be blocked if a number of pixels is greater than or equal to a minimum threshold within the acceptable hole location. 
     
     
         7 . The method as recited in  claim 1 , wherein a misaligned hole is identified if the determined hole location is outside an acceptable hole location. 
     
     
         8 . The method as recited in  claim 7 , wherein the results of the through-hole inspection include a plurality of sets of pixels, each of the sets of pixels corresponding to one of the plurality of holes. 
     
     
         9 . The method as recited in  claim 8 , wherein the determined location of each of the plurality of holes is a centroid of a corresponding one of the plurality of sets of pixels. 
     
     
         10 . The method as recited in  claim 8 , wherein the determined location of each of the plurality of holes is a pixel on a perimeter of a corresponding one of the plurality of sets of pixels. 
     
     
         11 . The method as recited in  claim 7 , wherein the determined location of the plurality of holes is expressed relative to secondary datums. 
     
     
         12 . The method as recited in  claim 11 , wherein the determined location of the plurality of holes is translated from being expressed in terms of secondary datums to being expressed in terms of primary datums. 
     
     
         13 . The method as recited in  claim 12 , wherein the component is an airfoil including an airfoil section and a root, the secondary datums located on the root, and the primary datums located on the airfoil section. 
     
     
         14 . An inspection assembly, comprising:
 a thermal imaging camera;   a fixture for supporting an engine component;   a fluid source in communication with a passageway of the engine component; and   a controller configured to perform a through-hole inspection on the component, and configured to determine a location of the plurality of holes from results of the through-hole inspection.   
     
     
         15 . The assembly as recited in  claim 14 , including a conduit connecting the fluid source to the passageway. 
     
     
         16 . The assembly as recited in  claim 14 , wherein the controller is configured to identify blocked and partially blocked holes by comparing a number of pixels within an acceptable hole location with a minimum threshold. 
     
     
         17 . The assembly as recited in  claim 14 , wherein the controller compares the determined hole locations for each of the plurality of holes with acceptable hole locations to identify misaligned holes. 
     
     
         18 . The assembly as recited in  claim 14 , wherein the controller is in communication with a model, the model including a minimum pixel threshold and acceptable hole locations. 
     
     
         19 . The assembly as recited in  claim 14 , wherein the fixture supports the engine component at a root of the engine component.