How to Repair a Borescope

Written by sarena fuller
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How to Repair a Borescope
Rigid borescopes help with aircraft inspection. (aeroplane image by Stanisa Martinovic from

A tool designed to fit into very tight places, borescopes work especially well for diagnosing and inspecting other machines. The borescope is essentially a tube fitted with an eyepiece on one end and a reflective lens on the other, much like a telescope or camera. Different types of borescopes include rigid and flexible, and they have varying industry applications. GE sells rigid borescopes for inspecting aircraft engines and automobiles. Flexible borescopes, on the other hand, help with small, detailed areas of work such as clocks or computers.

Skill level:

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Things you need

  • Borescope
  • Replacement parts

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  1. 1

    Disassemble and clean your borescope thoroughly, paying special attention to the lens train, optics and spacers. Polish lenses and lubricate all moving parts. Simply polishing lenses and cleaning the machine often will restore functionality.

  2. 2

    Inspect the disassembled borescope to determine the problem. Look for any missing or broken components, scratched lenses or burnt-out light bulbs. Check for correctly focusing lenses and undamaged bending sections. Alternatively, obtain a professional evaluation.

    How to Repair a Borescope
    Replace burnt-out light bulbs. (small light bulb image by Antonio Oquias from
  3. 3

    Replace any broken components by ordering from the same company and brand as your borescope to ensure the best compatibility. JME Technologies, for instance, sells all types of borescopes as well as replacement parts. These include spare light bulbs, fuses, light guides, scopes, guide tubes, eyepieces and side-view prisms.

  4. 4

    Reassemble the components and test the machine by troubleshooting. Make sure all the parts work correctly. If you find more extensive issues, such as a broken CCD chip for a video borescope, consider sending it to a professional repair company.

Tips and warnings

  • If you cannot find the problem, borescope repair companies often offer a free evaluation for diagnosis and repair.

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