Abstract: A mechanical testing process for insuring composite patch bond integrity. A composite patch is applied to an aircraft aluminum skin. A thermal imaging system views the composite patch using both low and high heat techniques with prior calibration to a calibration standard. The inspection using these techniques produces images which are stored and these images so produced will display defects such as delaminations and disbonds, for example. These images are compared to calibration standard images to determine if the defect in the installed composite patch is sufficiently serious to require removal of the defective composite patch and another composite patch to be applied. Mechanical testing results are used in conjunction with thermography testing to determine composite patch bond integrity.