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What is OCCM in Aviation? (On Condition / Condition Monitored Components)

Updated: March 06, 2024

Introduction to On Condition / Condition Monitored Components (OCCM)

In the aviation industry, ensuring the safety, reliability, and efficiency of aircraft is of paramount importance. To achieve this, aircraft manufacturers and operators utilize advanced technologies and techniques, such as on condition / condition monitored components (OCCM). OCCM refers to a system of monitoring and maintaining aircraft components based on their condition, rather than scheduled maintenance intervals. By utilizing real-time data and advanced monitoring techniques, OCCM enables more efficient maintenance practices, reducing downtime and costs while enhancing safety.

The Concept of OCCM

The traditional approach to aircraft maintenance involves adhering to fixed maintenance schedules, regardless of the actual condition of the components. This often leads to unnecessary maintenance actions, resulting in increased costs and aircraft downtime. In contrast, OCCM focuses on monitoring the condition of critical components and performing maintenance or replacement based on their actual condition. This proactive approach ensures that components are replaced or repaired only when necessary, optimizing maintenance efficiency and reducing operational costs.

OCCM relies on advanced monitoring techniques, such as sensor networks, data analytics, and predictive modeling, to continuously assess the condition of critical components in real-time. By collecting and analyzing data on factors such as temperature, vibration, wear, and corrosion, OCCM systems can detect potential issues or performance degradation before they become critical. This allows maintenance actions to be planned and executed in a timely manner, minimizing the risk of component failure and unscheduled downtime.

Benefits of OCCM

Implementing OCCM in aviation brings several significant benefits to both aircraft manufacturers and operators:

Enhanced Safety: OCCM enables proactive maintenance, reducing the risk of component failures and related safety incidents. By continuously monitoring component health, potential issues can be identified and addressed before they pose a threat to flight safety.
Reduced Costs: OCCM eliminates unnecessary maintenance actions by focusing on the actual condition of components. This leads to cost savings in terms of reduced labor, spare parts, and aircraft downtime.
Increased Availability: By minimizing unscheduled maintenance events, OCCM improves aircraft availability and reliability. This translates to increased operational efficiency and customer satisfaction.
Optimized Maintenance Planning: OCCM provides real-time data on component condition, enabling maintenance planning based on actual needs rather than fixed schedules. This allows for better resource allocation and optimization of maintenance activities.

It is important to note that implementing OCCM requires a robust data collection and analysis infrastructure, as well as skilled personnel capable of interpreting the data and taking appropriate maintenance actions. However, the benefits outweigh the initial investment, making OCCM an increasingly adopted practice in the aviation industry.

Implementing OCCM in Aviation

Implementing OCCM in aviation involves several key steps to ensure its successful integration into existing maintenance practices:

Data Collection and Monitoring

The first step in implementing OCCM is establishing a reliable data collection and monitoring system. This involves installing sensors and data acquisition systems on critical aircraft components to continuously monitor their condition. These sensors can measure various parameters, such as temperature, pressure, vibration, and fluid levels, providing real-time data on the health of the components.

Furthermore, advanced analytics and machine learning algorithms can be applied to the collected data to detect patterns, anomalies, or potential issues. This enables predictive maintenance, where maintenance actions are planned based on the predicted future condition of the components. By detecting early signs of degradation or impending failure, maintenance can be scheduled in a controlled manner, minimizing disruptions to aircraft operations.

Integration with Maintenance Systems

OCCM should be seamlessly integrated with existing maintenance systems and processes to ensure efficient implementation. This integration enables automatic triggering of maintenance actions based on the condition monitoring data, as well as updating maintenance records and scheduling future inspections or replacements.

Additionally, OCCM systems can provide real-time notifications and alerts to maintenance personnel, enabling them to take immediate action in response to critical component conditions. This proactive approach reduces response time and ensures that maintenance actions are carried out in a timely manner, further enhancing safety and operational efficiency.

Continuous Improvement and Evaluation

Implementing OCCM is an iterative process that requires continuous improvement and evaluation. As more data is collected and analyzed, the OCCM system can be fine-tuned to improve its accuracy and reliability. This involves refining the predictive models, adjusting sensor configurations, and incorporating feedback from maintenance personnel.

Regular evaluations and audits should also be conducted to assess the effectiveness of the OCCM system and identify areas for improvement. By continuously optimizing the OCCM implementation, aircraft manufacturers and operators can maximize its benefits and ensure long-term success.


On condition / condition monitored components (OCCM) revolutionize aircraft maintenance by shifting from fixed maintenance schedules to a condition-based approach. By continuously monitoring critical components and performing maintenance actions based on their actual condition, OCCM improves safety, reduces costs, increases availability, and optimizes maintenance planning. Implementing OCCM involves establishing robust data collection and monitoring systems, integrating with existing maintenance systems, and continuously improving the implementation through evaluation and refinement. As the aviation industry continues to embrace advanced technologies, OCCM is becoming an essential practice to ensure the safe and efficient operation of aircraft.

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