What does a tactile check/inspection involve?

A tactile check or inspection involves physically touching the wings and surfaces of the aircraft to detect any potential issues with de-icing or contamination. This hands-on approach allows personnel to assess the condition of surfaces more accurately than visual inspection alone. By using their hands, inspectors can feel for irregularities such as ice, frost, or other foreign substances that might not be visible to the naked eye. This tactile method is an essential part of ensuring that the aircraft is adequately prepared for safe operation, as it helps to verify that all critical areas are clear and in proper condition before flight.

Visual inspection is a valuable technique, but it cannot replace the thoroughness provided by a tactile check, which adds a layer of assurance by engaging the sense of touch.