The PolyU Aviation Services Research Centre (ASRC) has developed a novel NDT technique to inspect metallic and carbon fibre composite structures without the need to remove sealant. Damage such as cracks can be detected by induction thermography under a layer of sealant or other material (coating, stickers), thus making the inspection task easier.
Inspections inside fuel tanks or other confined areas is time consuming and challenging. The structure beneath each rivet must be visually inspected. To do this, the sealant covering all the rivets must first be removed. This process is time-consuming, as well as costly in terms of consumable abrasives.
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