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UK air traffic meltdown 'one in 15 million' event: NATS
Thousands of passengers were stranded for days after 1,500 flights were cancelled on August 28 during one of the busiest travel periods of the summer
Passengers wait at Gatwick Airport, south of London, on August 29, 2023 after UK flights were delayed over a technical issue. — AFP file
An air traffic meltdown that hit Britain last week was caused by a "one in 15 million" event, the boss of traffic control provider NATS said, after it cited a flight plan with two identically named markers as the reason for the chaos.
Thousands of passengers were stranded abroad for days after 1,500 flights were cancelled on Aug. 28, during one of the busiest travel periods of the summer.
"This was a one in 15 million chance," NATS CEO Martin Rolfe told the BBC.
"We've processed 15 million flight plans with this system up until this point and never seen this before."
Rolfe said a few days ago the problem would not be repeated.
The NATS report published on Wednesday said the flight plan included two identically named but separate waypoint markers outside UK airspace, which forced the system to enter fail-safe mode.
"In these circumstances, the system could not reject the flight plan without a clear understanding of what possible impact it may have had. Nor could it be allowed through and risk presenting air traffic controllers with incorrect safety-critical information," NATS said.
NATS said the flight plan was compliant with Eurocontrol's flight planning distribution system.
Britain's civil aviation regulator said it would review circumstances surrounding the failure.
"If there is evidence to suggest NATS may have breached its statutory and licensing obligations we will consider whether any further action is necessary," Rob Bishton, Joint-Interim Chief Executive at the UK's CAA, said in a statement.
That means NATS could end up footing some of the bill for the chaos.
Global airline group IATA has said the episode could cost airlines up to 100 million pounds ($126 million) as passengers whose flights were cancelled will be able to claim back expenses for the hotels they stayed in or the new tickets they bought.
Britain-based airline easyJet said the NATS report left some questions unanswered, and although it welcomed the review it believed a more wide-ranging examination of resources and I.T. systems was necessary.
"A full independent and wide-ranging review of NATS is needed to ensure it is fit for purpose today and in the future," easyJet said.
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