CRACK ANALYSIS OF AIRCRAFT SLAT AND FLAP SECTIONS USING NDT TECHNIQUES

Abstract: Non-destructive testing (NDT) is the most economical way of performing inspection. NDT is used in aircraft maintenance to detect cracks in aircraft. In this paperNDT techniques are used for inspection in Boeing 757-200 aircraft wing for detecting cracks in slat and flap section of the wing. The inspection is carried out by using two main NDT methods, ultrasonic bond testing and eddy current testing. As a result slat section inspection reveals the skin to core disbonding of wedge after particular flight cycle. Flap section shows cracks in support fitting assembly of inboard flaps. The inspection is carried out using two main NDT methods, ultrasonic testing and eddy current testing. Eddy current testing is used in flap section, and is mostly used for detection of fatigue cracks or stress corrosion. These failure of slats and flaps section causes reduced controllability of the aircraft.

Keywords: Non-destructive testing, disbonding, bond testing, eddy current inspection.