What is MTCHG on Boeing 737? (Matching)

Matching, also known as MTCHG, refers to a critical process in the maintenance and repair of the Boeing 737 aircraft. It involves identifying and replacing parts that require attention or have reached their service limits. This process ensures that the aircraft operates safely and efficiently by addressing any potential issues before they lead to failures or malfunctions.

Matching is an essential aspect of the maintenance program for the Boeing 737, as it allows airlines and maintenance technicians to stay on top of the aircraft’s condition and address any signs of wear or potential problems. By systematically checking and replacing parts, airlines can minimize unscheduled maintenance and ensure the safety of their passengers and crew.

The Importance of Matching

Matching plays a crucial role in maintaining the airworthiness of the Boeing 737 fleet. As one of the most widely used aircraft worldwide, with thousands of flights daily, ensuring its reliability and safety is of paramount importance. The Matching process allows maintenance personnel to detect and fix any issues that may compromise the aircraft’s performance or safety.

Through Matching, airlines can identify specific parts or systems that may require attention or replacement. This proactive approach helps prevent failures or malfunctions that could lead to accidents or incidents. By continuously monitoring the condition of the aircraft and addressing any potential problems, airlines can maintain a high level of safety and adhere to regulatory requirements.

Matching also contributes to cost-effective maintenance practices. By replacing parts at the right time, airlines can avoid costly unscheduled maintenance events that may disrupt flight schedules or cause inconvenience to passengers. Additionally, the planned replacement of parts through Matching can be scheduled during maintenance downtime, optimizing efficiency and reducing the impact on operational schedules.

The Matching Process

The Matching process involves several key steps that ensure the thorough inspection and replacement of necessary parts. These steps include:

1. Regular Inspections: Airlines and maintenance technicians perform regular inspections on the Boeing 737 to assess the condition of various components and systems. These inspections are typically scheduled based on scheduled maintenance intervals or flight hours. During these inspections, technicians visually inspect and test components to determine their serviceability.

2. Monitoring and Data Analysis: Airlines collect and analyze data from various sources, including flight data recorders, maintenance logs, and onboard monitoring systems. This data helps identify trends, patterns, or anomalies that may require further investigation or attention.

3. Identification of Matching Items: Based on the inspection results and data analysis, maintenance personnel identify parts or systems that require attention or replacement. These Matching items are categorized based on their criticality and the recommended maintenance actions.

4. Replacement Planning: Once the Matching items are identified, airlines and maintenance departments plan for their replacement. This includes ordering the necessary parts, scheduling maintenance downtime, and coordinating with other operational requirements.

5. Replacement and Documentation: The actual replacement of Matching items is carried out by trained maintenance technicians. The process involves removing the old or worn-out parts and installing new ones according to established procedures. All replacements must be documented accurately to maintain an updated record of the aircraft’s maintenance history.

These steps ensure a systematic and comprehensive approach to Matching on the Boeing 737. By following this process, airlines can effectively manage the maintenance of their aircraft and ensure their continued safe and reliable operation.

Incorporating Advanced Technologies

The Matching process has become more sophisticated and efficient over the years, thanks to advancements in technology and data analysis capabilities. Airlines now have access to advanced monitoring systems, such as aircraft health monitoring systems (AHMS) and predictive maintenance tools.

AHMS collect real-time data from various sensors and systems on the aircraft, allowing maintenance personnel to monitor its condition continuously. These systems can detect anomalies, abnormalities, or trends that may indicate the need for specific maintenance actions. By analyzing this data, airlines can proactively address potential issues before they escalate.

Predictive maintenance tools use data analysis and machine learning algorithms to predict the remaining useful life of components or systems. By analyzing historical data and the current operating conditions of an aircraft, these tools can estimate when specific parts may require replacement. This predictive capability helps airlines plan and schedule maintenance operations more effectively, reducing unplanned maintenance events and optimizing operational efficiency.

Furthermore, airlines can leverage digital technologies to streamline the Matching process. Digital maintenance systems enable real-time tracking of inspections, parts inventory, and maintenance work. These systems enhance communication and collaboration between maintenance crews, supply chain personnel, and other stakeholders, ensuring a smooth and efficient Matching process.

While Matching remains a fundamental process in maintaining the airworthiness of the Boeing 737, these advanced technologies empower airlines to take a proactive and data-driven approach to maintenance. By harnessing the power of data and digital tools, airlines can enhance safety, reliability, and operational efficiency in managing their aircraft fleets.


Matching plays a crucial role in the maintenance and repair of Boeing 737 aircraft. It ensures that parts and systems are regularly inspected, replaced when necessary, and documented accurately. This process helps airlines maintain the airworthiness of their aircraft, enhance safety, and optimize maintenance practices.

Adopting advanced technologies, such as AHMS and predictive maintenance tools, further enhances the Matching process by enabling proactive maintenance actions and optimizing resource allocation. With these tools, airlines can minimize unscheduled maintenance events, reduce operational disruptions, and improve cost-effectiveness.

By continuously prioritizing and investing in the Matching process, airlines can ensure the ongoing reliability, safety, and performance of their Boeing 737 fleets, providing passengers with a smooth and secure travel experience.

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