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Network disruptions

5 avril 2016 (mis à jour le 4 juillet 2016) - Transports

Network disruptions mainly consist in any event, anticipated or not, that may lead to reduce the number of flights crossing the impacted area or joining the concerned airports.


Delay percentage – breakdown by disruption causes


Special events

In 2015, special event delays mainly referred to the implementation of EEE (Electronic Environment ERATO) at Brest ACC. They encompassed the delays for training and real time transitioning purposes.

  • Securing a transitioning phase with a measured and regularly assessed capacity reduction is an essential prerequisite for new ATM systems’ implementations. In real traffic conditions, ATCOs’ expertise is built as such. This transitioning process guarantees that front line actors will maintain the highest level of safety while eventually deliver the expected capacity growth.
    Bordeaux ACC is the next ACC to implement EEE.


ATC Industrial action

The most significant strike occurred in April 2015 and resulted in nearly 400 000 minutes of delay.

  • Implement ATC minimum service when needed
  • Working towards long lasting social agreements



Weather events mostly concern airports and terminal areas with 90% of the induced delays. However, the month of July 2015 was particularly critical with about 80 000 minutes of delay, specifically affecting Bordeaux, Marseille & Reims ACC as the airspace covered was severely hit by a thunderstorm line crossing France eastward.

  • Improving weather forecast
  • Promoting collaborative “weather disruption” plans
  • CDM processes & crisis cell
  • Anticipating contingency solutions
  • Innovative operational solutions such as optimized LVP (Low Visibility Procedures) at Paris CDG


ATC capacity

In 2015, delays due to lack of ATC capacity represented 40% of overall delays, mostly affecting ACCs and thus insisting on the need for DSNA to drive more capacity into its airspace.

  • Making the best use of existing mitigation measures (ATFCM Air Traffic Flow and Capacity Management to ensure demand and capacity balancing)

Improving network’s predictability and stability.

Click here to read all about DSNA’s tactical flow management processes and flight plan conformance tool.

  • Implementing collaborative pre-tactical solutions such as CAP (Collaborative Advanced Planning)
  • Conducting an ambitious technical modernising program
  • Improving airspace design & promoting Advanced FUA (Flexible Use of Airspace)
  • Negotiating staff rostering solutions that adjust to the traffic demand.