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Transition from ACN/PCN to ACR/PCR: Understanding the ICAO's New Classification
The International Civil Aviation Organization (ICAO) has announced a significant change in the classification of runway capabilities and aircraft performance. Effective November 28, 2024, the ACN/PCN system will be replaced by the new ACR/PCR system. This update aims to modernize the global communication and understanding of runway capacities and aircraft requirements.What Were ACN and PCN?
In the previous system:- ACN (Aircraft Classification Number): Indicated the impact of a specific aircraft on a runway.
- PCN (Pavement Classification Number): Reflected the ability of a runway to withstand that impact.
The New System: ACR and PCR
The new system introduces several innovations:- ACR (Aircraft Classification Rating): Replaces ACN and provides a more detailed and flexible approach to classifying aircraft performance, taking into account new parameters and technologies.
- PCR (Pavement Classification Rating): Replaces PCN and offers a more precise assessment tailored to the current conditions of runways and operational requirements.
Key Changes and Conditions of Applicability
- Increased Precision and Flexibility: The ACR/PCR system enables more detailed and specific evaluations, which are crucial given advancements in aviation technologies and paving materials.
- Integration with New Technologies: The change reflects the adoption of new methods and technologies that were not addressed by the previous system, including innovations in paving and aeronautical engineering.
- Data Update Requirements: Airport authorities and aircraft operators will need to update their data and processes to ensure compliance and safety.
- Training and Capacity Building: A period of adaptation and training will be necessary to ensure a smooth transition to the new system.
Important Dates
- Effective Date: The ACR/PCR system will be officially implemented on November 28, 2024. After this date, all new classifications must adhere to the new system.
- Transition Period: There will be a period during which both the old and new systems may be utilized, but it is crucial for all stakeholders to prepare for the full implementation of ACR/PCR.
Conclusion
The transition from ACN/PCN to ACR/PCR represents a significant advancement in the assessment of runway capacities and aircraft impact. Through this update, the ICAO seeks to enhance the safety and efficiency of airport operations, ensuring that data aligns with the latest industry standards. The presentation of data will remain unchanged; only the calculation methods will be modified. Adequate preparation and adaptation to the new system will be essential for a safe and successful transition in aviation operations.References
ICAO Doc 9157 – Part III – PavementsFederal Aviation Administration. (2021). AC nº: 150/5320-6G.
I would like to bring attention to a significant change in ICAO pavement classification that I haven't seen aviation personnel discussing. I have created the article above to inform about this important change. What are your thoughts?