Borescope Inspection Procedure Pdf ((TOP)) Download

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Borescope Inspection Procedure Pdf ((TOP)) Download

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Borescopes are used for visual inspection work where the target area is inaccessible by other means, or where accessibility may require destructive, time consuming and/or expensive dismounting activities. Similar devices for use inside the human body are referred to as endoscopes. Borescopes are mostly used in nondestructive testing techniques for recognizing defects or imperfections.

Borescopes are commonly used in the visual inspection of aircraft engines, aeroderivative industrial gas turbines, steam turbines, diesel engines, and automotive and truck engines. Gas and steam turbines require particular attention because of safety and maintenance requirements. Borescope inspection of engines can be used to prevent unnecessary maintenance, which can become extremely costly for large turbines. They are also used in manufacturing of machined or cast parts to inspect critical interior surfaces for burrs, surface finish or complete through-holes. Other common uses include forensic applications in law enforcement and building inspection, and in gunsmithing for inspecting the interior bore of a firearm. In World War II, primitive rigid borescopes were used to examine the interior bores (hence "bore" scope) of large guns for defects.[1]

The traditional flexible borescope includes a bundle of optical fibers which divide the image into pixels. It is also known as a fiberscope and can be used to access cavities which are around a bend, such as a combustion chamber or "burner can", in order to view the condition of the compressed air inlets, turbine blades and seals without disassembling the engine.

Traditional flexible borescopes suffer from pixelation and pixel crosstalk due to the fiber image guide. Image quality varies widely among different models of flexible borescopes depending on the number of fibers and construction used in the fiber image guide. Some high end borescopes offer a "visual grid" on image captures to assist in evaluating the size of any area with a problem. For flexible borescopes, articulation mechanism components, range of articulation, field of view and angles of view of the objective lens are also important. Fiber content in the flexible relay is also critical to provide the highest possible resolution to the viewer. Minimal quantity is 10,000 pixels while the best images are obtained with higher numbers of fibers in the 15,000 to 22,000 range for the larger diameter borescopes. The ability to control the light at the end of the insertion tube allows the borescope user to make adjustments that can greatly improve the clarity of video or still images.

Rigid borescopes are similar to fiberscopes but generally provide a superior image at lower cost compared to a flexible borescope. Rigid borescopes have the limitation that access to what is to be viewed must be in a straight line. Rigid borescopes are therefore better suited to certain tasks such as inspecting automotive cylinders, fuel injectors and hydraulic manifold bodies, and gunsmithing.

Criteria for selecting a borescope are usually image clarity and access. For similar-quality instruments, the largest rigid borescope that will fit the hole gives the best image. Optical systems in rigid borescopes can be of 3 basic types: Harold Hopkins rod lenses, achromatic doublets and gradient index rod lenses. For large diameter borescopes (over 12 mm), the achromatic doublet relays work quite well, but as the diameter of the borescope tube gets smaller the Hopkins rod lens and gradient index rod lens designs provide superior images. For very small rigid borescopes (under 3 mm), the gradient index lens relays are better.

The engine failure occurred when the aircraft was climbing 500 feet above ground level and was caused by fracture of compressor turbine (CT) blades. The engine was on a time between overhaul (TBO) extension program, which extended the normal 3,600-hour interval to 8,000 hours. The engine had 3,752.3 hours on it when the failure occurred. The borescope inspections were not being performed as frequently as recommended by Pratt & Whitney, and the operator had elected not to perform engine trend monitoring. The NTSB determined that if the engine manufacturer service bulletin had been complied with or specifically required as part of the borescope inspection procedure, possible metal creep or abnormalities in the turbine compressor blades might have been discovered and the accident prevented.

The State of Hawaii Health & Social Services Director, Loretta Fuddy, died in the crash. She was found by the rescue personnel wearing a partially inflated infant life vest. Although she did not suffer any significant traumatic injuries during the crash, her cause of death was directly attributable to not having proper safety gear on board the plane. No safety briefings were performed before the flight as Federal Aviation Administration regulations required. Passengers were not briefed on ocean ditching procedures or the location or usage of flotation equipment. Our firm successfully resolved the Fuddy case and that of another injured passenger.

Given our experience with borescope exams, we read with interest the new study by Barakat et al. on the use of artificial intelligence (AI) to assist with borescope examinations. We agree that human factors, including training, subjectivity, and the time and expertise needed to conduct borescope exams, can be barriers to implementation. We commend the authors for exploring how AI-supported borescope examinations could overcome these barriers. As Barakat et al. emphasized, endoscopes can be damaged during routine procedures, reprocessing, or transport, and as such, frequent borescope examinations would be beneficial. We have observed two approaches to implementing borescope inspections, namely using them for quality assurance during every reprocessing cycle or for periodic assessment of the endoscope fleet. Both approaches require careful consideration of program goals and logistics, such as what borescope sizes are needed; where, when and by whom exams will be performed; how exams fit into the reprocessing workflow; what will be done when defects are observed; and how to ensure that borescopes do not contribute to cross-contamination among the endoscope fleet or borescopist exposure to pathogens.

The value of inspections is dependent on image quality, which is impacted by the skill and technique used by the borescopist as well as the size and characteristics of the endoscope and whether soil, debris, fluid, lubricants, or simethicone are present and stick to the lens during the exam. The interpretation of observations by human borescopists or AI systems depends on their experience with diverse internal architecture of various models of endoscopes, as well as various defects that may be present. Therefore, both technicians and AI systems require extensive training and competency testing before they can successfully perform borescope examinations and interpret the findings.

Visual inspection of medical devices alone may not be enough in the cleaning process. STERIS VerifEye 2.0 Video Borescope provides illumination and magnification to assist in the visual inspection of medical devices that are not easily visible. The VerifEye Video Borescope's high-resolution visualization of previously inaccessible areas allows you to inspect for damage/residual bioburden and take necessary corrective action.

This water resistant digital borescope system assists in your processing cycle to inspect lumens for possible bioburden and damage visually. If debris is observed, it can be removed at the point of processing, saving time and avoiding potential cross-contamination. Damage can be detected early, and your equipment is sent for repair before a minor problem becomes a significant issue.

Regarding to the current and the future training and development plans of many airlines to have the competent, sufficient and backup staff able to practice a standard borescope inspection to satisfy their needs, EGYPTAIR TRAINING ACADEMY introduces Borescope courses for many types of aircraft engines in accordance to the international training standards and quality at any time.

Each course starts by covering Borescope equipment and terminology and describing the Gas Path of the engine. Then, Borescope inspection procedures are presented in details. The course includes theoretical and practical hours with assessment and examination.

Unique experience in the development and training of borescope engine inspection programs for more than fifteen types of aero engines. Qualifying the EGME borescope team to be responsible for more than 200 engines in making the best maintenance decision in accordance to the standard level of inspection which lead to fleet reliability and time/cost saving.

Using a borescope to inspect an engine is easier than you might expect. The main steps are (1) insert the probe into the cylinder, (2) inspect the components, and (3) remove the probe. Here are a few best practice recommendations from our remote visual inspection (RVI) team:

At the end of the inspection, a borescope report is generated enabling a detailed analysis and assessment of the condition of the engine. This is an important reference for future inspections and a reliable record of the performance and life expectancy of your equipment. In this way, borescope inspections help to keep large engines in proper working condition and avoid expensive, time-consuming, and unnecessary maintenance and repairs. 75035a25d1