Shannon FIR closed

[golfyankeesierra]

Originally Posted by ATC Watcher

Good one but even Khartoum has radar now, since quite some time even :-)

Yes, but only at Khartoum airport and Sudan is a little bit bigger then that. So unless you go down in Khartoum, no radar for you..
Never had the impression that APP and Center talk to each other anyway.
IFBP is still advised over Khartoum. And I still SLOP there.

[sejo]

Irish Aviation Authority Update on Technical Issue 11:30 - October 4

04 Oct 2018The IAA has confirmed that following a thorough investigation of a technical issue on our primary Air Traffic Control (ATC) system in Ballycasey, County Clare, (which occurred on Tuesday the 2nd of October) the issue has been identified and isolated.

The issue was an irregular software occurrence.

Over the course of last night (3rd – 4th October) the IAA transferred service back to its primary system, which has been restored to full capacity. The IAA continues to provide a full service to airlines and passengers.

Technical experts and the system manufacturer worked tirelessly to identify the issue, research, isolate and to resolve the matter.

When this was completed, a comprehensive testing and safety analysis was carried out to ensure that the system was fit to return to operations. The outcome of this was positive and accordingly operations were transferred back to the primary ATC system last night.

When the technical issue occurred on Tuesday evening, we are satisfied that the back-up system and contingency planning worked as required. This ensured that we restored full service in a safe and timely manner and disruption to aircraft was minimal.

The IAA continues to invest in its state-of-the-art air traffic management system and in the development of our staff, to deliver a world-class service to our airline customers.

We wish to clarify some issues reported in some media outlets:

• The technical issue which occurred was not a radar issue.Full radar coverage was maintained at all times.
• The technical issue involved a module on our ATC system which affected the performance of this system.The IAA took the decision to move to its back-up systems in order to maintain a full and safe service to aircraft.
• The IAA must follow a regulatory procedure when transferring to the back-up system.This procedure ensures safety of operations; however it necessitated the restrictions on traffic flow which occurred on Tuesday evening.
• The back-up system is a full replica of the IAA’s main ATC system.This allowed the IAA to provide a full and normal, safe ATC service once transfer to this system was completed.

[sejo]

Another radar outage occurred this morning - not sure whether this was the same system or something specific to Dublin only.

twitter.com/DublinAirport/status/1066267157544218624

From Eurocontrol

EIDW (Dublin)
The earlier radar issue is now in a recovery phase and the zero rate has been cancelled however arrivals remain regulated with a reduced rate and delays are moderate to high
until 1300utc.
NM are monitoring the situation and will update accordingly.

[Hotel Tango]

what happened to procedural control.

Be realistic. Do you have any idea of what procedural control entails and how useless it would be in much of today's saturated European airspace? Even if it was an option, in much of the airspace the acceptance rate would be a tiny and negligible fraction of that available in a radar environment.

[Tech Guy]

Originally Posted by sejo

The issue was an irregular software occurrence.

Thats a rather good way of putting it. I will remember that for future use.

[firewall]

Hotel tango My comment was in relation to traffic transiting Shannon mostly oceanic which are outside radar coverage for most of the crossing. Of course traffic would be restricted but not to zero. And yes I do know what procedural control entails having worked in that environment .

[Hotel Tango]

firewall, I suspect that the overflying oceanic traffic, would have continued as planned. There are however also multiple non oceanic traffic climbing and descending which in this day and age is a very different cup of tea to control procedurally. I worked in a procedural ATCC back in the late 60s when the volume (and speed in many cases) of traffic was a great deal less than today. Then there's the question of training and maintaining currency for an event which is likely to occur only once in a blue moon. No, the best solution is that which was taken.