System Outage – 20/21 April 2026​

THE UK AFS, AFTN AND AERONAUTICAL MESSAGE HANDLING SYSTEM NETWORK WILL BE INTERRUPTED FOR 45 MIN BETWEEN THE 20 APR 2100Z AND THE 21 APR 0200Z DUE TO MAINT.

THE OUTAGE WILL AFFECT ALL INTL AND NATIONAL CONNECTIONS TO THE UK MESSAGE SWITCH. NO AFS DATA WILL BE EXCHANGED HOWEVER, NOTAM PROPOSALS AND MESSAGES WILL QUEUE FOR DELIVERY ONCE THE OUTAGE IS COMPLETE. AFTN NOTIFICATION MESSAGES WILL BE SENT TO ADVISE 1 HR BEFORE START OF OUTAGE, AND AGAIN WHEN THE SVC IS RESUMED