The problem began at 0945 local time Wednesday morning 27 May, 2015. Eurocontrol recently tweeted there will be a “gradual restarting of systems that will start at 12UTC with some flights to/from Brussels.”
As of 1 p.m. local time, Brussels Airlines had to cancel 85 flights, including four long-haul flights to Africa,” airline spokesperson Wencke Lemmes told ATW in Brussels.
She added that more than 40% of planned flights for Wednesday had to be canceled; seven so far have been diverted to other airports. “This affects more than 11,000 passengers from Brussels Airlines. We do hope, that we can operate several other long haul flights, like to New York JFK, later during the day,” Lemmes said.
Until noon, Zaventem had to cancel 109 flights; 25 had been diverted to other airports around Europe, including Frankfurt, Paris and Maastricht Aachen.
No exact details had been given what is the cause of the technical failure.