Aviation Borescope & Videoscope
Borescope inspection assist in the internal inspection of component which are inaccessible with a conventional mirror and flashlight. In aerospace the two most common uses are the detection of corrosion and internal engine inspections.
The NDT Visual borescope-videoscope inspection is only as effective as the inspector and the quality of the image being produced by the visualization tool. Many errors in this process are made do to simple orientation of the display and lack of clarity, maginfication and glare. Most people know that not enough light is a problem but fail to realize that too much light can cause a blinding glare causing the inspection to be ineffective. The proper selection of a visualization tool and lighting are equally as important.
When visualizing a forging, weldments or casting through a borescope the surface texture of the component is usually difficult to gage do to the one dimensional representation observed on the display. This requires a properly trained Level II visual testing NDT technician to be able to decipher what is really being displayed on the screen or borescope or videoscope.
When performing an ndt RVI remote visual inspection internal inspection shadows and lighting represent distinct issues which could lead to inappropriate interpretation of the surface being inspected. When visually inspecting critical engine components these tools assist in providing a closer look at the engine environment which would not be accessible without a full engine tear down. The use of these tools allows for a cost saving way of evaluating the internal condition of a aircraft engine.
Corrosion occurs on almost all metals, borescopes and videoscopes allow you to look in the areas that would usually be inaccessible. Magnifying glasses, comparators and mirrors allow you to inspect areas which are easily accessible. Most visual inspections with magnification occur with a magnifying glass which is at least 5X magnification and 50 foot candle of white light. Conventional NDT standards require 100 foot candles of lighting in order to perform the inspection correctly. Mirrors are available in a variety of sizes and shapes to facilitate the ability to look around a corner where your hand and tools can reach but is invisible without the aid of the mirror.
When utilizing any of these visual aids a scanning pattern is critical and the speed of the inspection is usually reduced drastically. To schedule a visual aerospace NDT Level I or II training class or to have your component inspected by a qualified and certified NDT Level 2-3 give us a call.