The US Federal Aviation Administration (FAA) ordered all departing flights nationwide to remain grounded on Friday, November 13, after a communications failure disrupted air traffic control operations.
The nationwide order, issued on safety grounds, came after an earlier halt to departures at Chicago airports.
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US Transportation Secretary Sean Duffy said the problem affected all 22 regional air traffic control centres, which oversee aircraft flying between airports.
What caused the disruption?
The FAA reported communication problems at its Air Route Traffic Control Centers, but the exact technical fault was not immediately clear.
Technicians worked to identify the problem as the agency imposed nationwide restrictions.
The incident has renewed attention on the condition of America’s ageing air traffic control infrastructure.
Congress approved $12.5 billion last year for a modernisation programme. The FAA and White House also sought another $30.1 billion on Friday to address further infrastructure needs.
What happened to flights already in the air?
Aircraft already airborne were allowed to continue their journeys and land.
The ground stop primarily affected flights waiting to depart from US airports, while inbound international flights were to be managed individually.
The FAA initially instructed departing aircraft to remain on the ground until further notice.
Are UAE flights affected?
