The CEOs of major US airlines have warned that the 5G technology could disrupt the aviation industry and leave thousands of travelers stranded.

Iran PressAmerica: The chief executives of major US passenger and cargo carriers on Monday warned of an impending “catastrophic” aviation crisis in less than 36 hours when AT&T (TN) and Verizon (VZ.N) are set to deploy a new 5G service, Reuters reported.

The airlines warned the new C-Band 5G service set to begin on Wednesday could render a significant number of widebody aircraft unusable, “could potentially strand tens of thousands of Americans overseas,” and cause “chaos” for US flights.

“Unless our major hubs are cleared to fly, the vast majority of the traveling and shipping public will essentially be grounded,” wrote the chief executives of American Airlines (AAL.O), Delta Air Lines (DAL.N), United Airlines, Southwest Airlines (LUV.N) and others in a letter first reported by Reuters.

The Federal Aviation Administration (FAA) has warned that potential interference could affect sensitive airplane instruments such as altimeters and significantly hamper low-visibility operations.

“This means that on a day like yesterday, more than 1,100 flights and 100,000 passengers would be subjected to cancellations, diversions or delays,” the letter cautioned.

Airlines late on Monday were considering whether to begin canceling some international flights that are scheduled to arrive in the United States on Wednesday.

“With the proposed restrictions at selected airports, the transportation industry is preparing for some service disruption. We are optimistic that we can work across industries and with government to finalize solutions that safely mitigate as many schedule impacts as possible,” planemaker Boeing (BA.N) said on Monday.

Action is urgent, the airlines added in the letter also signed by UPS Airlines (UPS.N), Alaska Air (ALK.N), Atlas Air (AAWW.O), JetBlue Airways and FedEx Express (FDX.N). “To be blunt, the nation’s commerce will grind to a halt.”

The letter went to White House National Economic Council director Brian Deese, Transportation Secretary Pete Buttigieg, FAA Administrator Steve Dickson and Federal Communications Commission (FCC) Chairwoman Jessica Rosenworcel.

According to the letter, 5G can interfere with radio altimeters, which provide "critical safety information" to safety and navigation systems on planes. Due to this problem, "huge swaths" of airplane fleets may need to be "indefinitely grounded."


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