What is the primary purpose of an engine borescope inspection?

The primary purpose of an engine borescope inspection is indeed the internal inspection of gas path condition. This specialized inspection technique involves using a flexible or rigid scope equipped with a camera and light source to closely examine the internal components of an aircraft engine without needing to disassemble it.

This method allows for the assessment of critical areas such as compressor blades, combustion chambers, and turbine sections, where damage, wear or foreign object debris may not be visible from the outside. The ability to examine the engine's internal components directly helps in identifying issues like blade deterioration, abnormal wear patterns, or potential failures, which are crucial for maintaining engine performance and safety.

While identifying surface corrosion, conducting external visual checks, and assessing engine noise levels are important aspects of engine maintenance and health monitoring, they do not utilize the unique capabilities offered by a borescope. The strength of a borescope inspection lies in its ability to provide detailed visual access to the engine's internal workings, making it essential for comprehensive engine health assessments.