Borescope

A Thorough and Efficient Method to Monitor Engine Health

3 Key Reasons to Have a Borescope Inspection

1. Early Detection of Issues:

– Prevent Major Failures: Borescope inspections allow for the early identification of cracks, corrosion, wear, and other defects within the engine’s internal components. Detecting these issues early can prevent minor problems from developing into major, costly failures.

– Targeted Maintenance: By pinpointing specific areas that require attention, borescope inspections enable targeted maintenance, reducing the likelihood of unexpected breakdowns and enhancing overall engine reliability.

 

2. Cost Efficiency:

– Reduce Downtime: Since these inspections are non-invasive, they can be performed without disassembling the engine, significantly reducing downtime. This means aircraft can return to service more quickly, improving operational efficiency.

– Lower Repair Costs: Identifying and addressing potential issues early through borescope inspections can prevent more extensive and expensive repairs. This proactive approach helps in managing maintenance budgets more effectively.

 

3. Regulatory Compliance and Safety:

– Adhere to Standards: Regular borescope inspections are often required to comply with aviation regulations and manufacturer guidelines. Adhering to these standards ensures the engine meets all safety and performance criteria.

– Enhance Safety: Ensuring that the engine’s internal components are in good condition is crucial for safe operation. Borescope inspections help maintain the engine’s structural integrity, reducing the risk of in-flight failures and enhancing the overall safety of the aircraft.

Technician examining the fan blades on a CFM56 turbine engine.

Borescope Inspection for CFM56 Engine

A borescope inspection is a critical diagnostic procedure used to evaluate the internal condition of a CFM56 engine without disassembly. Utilizing a specialized flexible or rigid optical device called a borescope, technicians can visually inspect and assess the engine’s internal components through small access ports.

 

Key Features:

  1. Non-Invasive Procedure:

    • Conducted without dismantling the engine, minimizing downtime and reducing maintenance costs.
  2. Detailed Visual Assessment:

  3. Early Detection of Issues:

    • Identifies wear, corrosion, cracks, and other potential issues early, enabling proactive maintenance and preventing more severe problems.

You’ve got questions, we’ve got answers. 

CFM56-3 High-Pressure Turbine (HPT)
Blade Foreign Object Damage

Foreign Object Damage (FOD) to the High-Pressure Turbine (HPT) blades of a CFM56-3 engine can have serious operational implications. Damage to the turbine blades can cause a loss of thrust, an increase in Exhaust Gas Temperature (EGT), and reduced climb performance.

 

While most commercial aircraft are equipped with two or more engines, allowing for the possibility of a successful take-off and landing following such an event, any engine failure of this nature demands immediate inspection and corrective action. Prompt attention is critical to ensuring the continued safety of the aircraft, its crew, and all souls on board.

 

At Turbine Engine Solutions, our skilled technicians specialize in the assessment, repair, and overhaul of CFM56-3 engines affected by FOD. Leveraging our advanced diagnostic capabilities and repair expertise, we restore engines to peak operational performance—ensuring reliability, safety, and compliance with the highest industry standards.

 


 

Technical Insight: Why FOD Causes EGT to Rise
HPT blades operate in extreme temperature and pressure conditions, extracting energy from high-velocity exhaust gases to drive the compressor stages. When FOD damages blade surfaces or leading edges, airflow is disrupted, reducing aerodynamic efficiency. The engine compensates by burning more fuel to maintain thrust, which increases EGT. Prolonged operation in this state accelerates wear, reduces turbine life, and can lead to more severe failures if left unaddressed.

Borescope hooked up to a CFM56 engine through an access port.

Benefits:

  • Enhanced Safety:
    • Early detection of defects and wear ensures timely repairs, contributing to the overall safety and reliability of the engine.
  • Cost Savings:
    • Prevents expensive repairs by identifying issues before they escalate, reducing the need for extensive overhauls.
  • Operational Efficiency:
    • Minimizes engine downtime, ensuring that aircraft are returned to service promptly.
  • Compliance:

In summary, this type of inspection is an essential part of the maintenance regime for CFM56 engines, offering a thorough and efficient method to monitor engine health, ensure safety, and maintain optimal performance. 

Frequently Asked Questions

All You Need To Know About The Borescope Inspection Of A CFM56 Engine.

What is a borescope inspection?

Borescope inspection is a non-destructive method used to examine the internal components of the CFM56 engine. This technique provides a detailed view of engine parts without disassembling it, helping to identify any wear or damage.

Inspections are critical for the CFM56 engine’s performance. They help in detecting early signs of wear and tear, ensuring safety and reliability during flight operations.

The inspection typically involves inserting a borescope probe into the engine to capture images and videos. Technicians analyze these visuals to assess the condition of key components.

During the inspection, you can expect a thorough examination of specific engine parts like turbines and combustion chambers. The results are usually detailed in a report after the procedure is completed.

Common findings during an inspection can include signs of erosion, cracks, or other damages. Identifying these early can prevent more serious issues down the line.

How often should I schedule inspections?

Inspections should be scheduled based on usage and manufacturer recommendations. Regular checks help maintain engine health and performance.

The equipment used includes borescopes, cameras, and various controls to ensure a detailed inspection. These tools allow for high-quality visual assessments of engine parts.

Certified technicians perform the inspections, ensuring they follow all industry standards and practices. Experience is crucial for accurate assessments.

Costs can vary depending on the service provider and the specific needs of your engine. It’s good practice to request quotes from several providers.

Yes, a detailed report is usually provided after the inspection, summarizing findings and any recommended actions based on the results.

We are a certified to perform borescope inspections on the following engines: CFM56-2, CFM56-3, CFM56-5, CFM56-7, JT8, PT6, and the CF6-80.