We are pleased to announce the availability of the following draft EUROCAE document prepared by EUROCAE WG-104 SWIM Services:

• ED-254A: Arrival Sequence Service Performance Standard Revision A. 

ED-254 was produced in 2018 and represents one of the first SWIM service definitions produced and entered in the SWIM registry. Following early implementation experience in 2023, specific issues relating to implementability and leaving room for interpretation were identified. ED-254A is promoting greater interoperability and improved implementability. In addition to assorted corrective and clarifying editorial updates, Revision A provides in its Appendix A a recommended implementation example building upon REST and AMQP technologies and ensuring its full and complete consistency with the service requirements. For a full record of normative changes against ED-254 see Appendix D. The Supplementary Material contains digital, machine readable Artefacts from the Standard that at a later stage will be made available in a separate repository.

You are invited to review the proposed draft on the EUROCAE Workspace and complete the comment form. If you are a non-member of EUROCAE, please register here (and click on “Access only to Open Consultation”). Early replies are encouraged.

End Date: 26/10/2025.