Nationwide ground stop in US attributed to copper wire upgrade issue

A nationwide ground stop in the US, causing thousands of flight cancellations, has been attributed by Transport Secretary Sean Duffy to a copper wire upgrade gone wrong.

The problem arose during maintenance work carried out by L3Harris, a company responsible for upgrading the country's telecommunications system from copper wire to fibre. The transport secretary stated that an investigation is underway to determine whether the issue was due to faulty equipment or incompetence on the part of the contractor.

A cyber-attack has been ruled out as a cause, although officials are still examining all possibilities. Duffy explained at a news conference that the old telecommunications system in place is "incredibly outdated", which may have contributed to the malfunction.

The maintenance work was an attempt to switch from copper wire to fibre, and a router being worked on began to flood other air traffic control systems, causing communication issues with planes.

The investigation into the nationwide flight suspension is ongoing, with the FAA and L3Harris working together to understand the causes of the disruption.

According to L3Harris, they had completed over 70% of the work on modernizing communications infrastructure before the shutdown occurred on Friday afternoon.

The company stated that it takes the impact of the ground stop seriously, acknowledging its effects on travelers, airlines, and air traffic operations, as well as the inconvenience caused by cancelled and delayed flights.

Passengers were left stranded in planes on the tarmac, unable to take off or return to the gates, while some international flights managed to depart US airports in an apparent effort to clear space.

The US transport secretary has warned that a similar air traffic control infrastructure issue could cause nationwide flight suspensions unless Congress approves upgrades to the system.

US President Donald Trump had requested $30.1bn for these infrastructure improvements, but it remains uncertain whether Congress will approve the funds given its current Republican majority in both chambers.

Former TSA Administrator John Pistole expressed concerns that despite the quick resolution of this incident, another disruption could occur at any time, highlighting the resilience and fragility of the air traffic control system simultaneously.