Non Destructive Testing

NON-DESTRUCTIVE TESTING

INTRODUCTION

In aircraft maintenance programme it is important to inspect the robotic damage and assess the extent of the repair work. But in schedule maintenance it is a difficult to finding the defects rapidly, as the maintenance of aircraft must be accomplished within schedule time and same to be released in time for commercialized operation.

During aircraft maintenance NONDESTRUCTWE TESTING (NDT) is the most economical way of performing limited review and this is the only way of discovering defects. In simply we bear say, NDT squeeze out detect cracks or any other irregularities in the airframe social structure and engine components which are obviously not visible to the defenseless eye.

Structures & different assemblies of aircraft are made from various materials, such as aluminium alloy, steel, titanium and composite materials. To dismantle the aircraft in pieces and indeed examine each component would take a immense time, so the NDT method and equipment selection must be steady and effective.

In the present trend of NDT application on aircraft 70-80% of NDT is performed on the airframe, structure, landing gears and the rest carried out on engine & tie in components.





In order to maintain the aircraft defects free and ensure a high degree of quality & reliability and as a part of inspection programme, usually following NDT methods are apply;

1) Liquid penetrant 2) Magnetic particle, 3) Eddy current 4) Ultrasonic 5) skiagraphy (x-ray/gama ray) 6) Visual/Optical 7) Sonic/Resonance 8) Infrared Thermography.

disparate NDT METHODS

1. Liquid Penetrant :

Liquid penetrant scrutiny is one of the oldest of modern non-destructive testing methods & widely used in aircraft maintenance. Liquid penetrant testing can be defined as a physical & chemical non-destructive procedure designed to detect & expose surface connected discontinuities in nonporous engineering materials.

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