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Buttigieg warns airlines to finish retrofitting planes to avoid interference from 5G signals

Buttigieg warns airlines to finish retrofitting planes to avoid interference from 5G signals
Transportation Secretary Pete Buttigieg speaks about airline flight delays and cancelations in the South Court Auditorium on the White House complex, Monday, May 8, 2023, in Washington. Buttigieg is warning airlines to be ready when wireless companies power up their 5G service next month. Buttigieg told an airline trade group Friday, June 23, 2023, that planes won’t be allowed to land in poor visibility if they lack equipment to avoid radio interference from 5G. On July 1, AT&T, Verizon and other wireless carriers will be free to boost the power of their 5G signals. Credit: AP Photo/Evan Vucci, File

Transportation Secretary Pete Buttigieg warned the nation’s airlines Friday that flights could be disrupted starting next week because some planes lack updated equipment to prevent interference from transmissions by wireless companies.

Buttigieg said that only planes retrofitted with the right equipment will be allowed to land when visibility is poor, such as during bad weather.

The warning—in a letter from Buttigieg to trade group Airlines for America—comes just before AT&T, Verizon and other wireless carriers will be free to boost the power of their C-Band, 5G signals on July 1.

Airlines have told the government they are having trouble getting equipment to retrofit planes because of supply-chain problems. Still, the industry trade group said airlines are confident they will avoid disruptions.

Some aviation experts believe that C-Band signals are too close on the radio spectrum to the frequencies used by radio altimeters, which measure the height of a plane above the ground. Newer altimeters are protected from interference, but some airlines have complained that a shortage of the devices has prevented them from upgrading all their planes.

It’s unclear whether the spectrum conflict could cause major travel disruptions. When the issue arose early last year, predictions of widespread problems turned out to be wrong, although a small number of flights were canceled or diverted.

Buttigieg warns airlines to finish retrofitting planes to avoid interference from 5G signals
A JetBlue passenger flight lands at Reagan Washington National Airport in Arlington, Va., across the Potomac River from Washington, Wed., Jan. 19, 2022. Transportation Secretary Pete Buttigieg is warning airlines to be ready when wireless companies power up their 5G service next month. Buttigieg told an airline trade group Friday, June 23, 2023, that planes won’t be allowed to land in poor visibility if they lack equipment to avoid radio interference from 5G. On July 1, AT&T, Verizon and other wireless carriers will be free to boost the power of their 5G signals. Credit: AP Photo/J. Scott Applewhite, File

Delta Air Lines said about 190 of its more than 900 planes won’t be equipped with updated radio altimeters by the deadline and could face restrictions operating in bad weather. The airline said it will route them carefully to limit disruptions while it works with a supplier to retrofit more planes through the summer.

American Airlines, Southwest Airlines and Frontier Airlines said they have retrofitted all their planes and do not expect problems. United Airlines said it expects to meet the deadline for all its “mainline” jets, although it referred questions about United Express planes to the smaller carriers that operate them.

The Federal Communications Commission, which granted the 5G licenses to the wireless companies, contends that there is no risk of interference, while the Federal Aviation Administration has taken the airlines’ side. Under pressure from the Biden administration, the wireless companies agreed to delay the full rollout of their new networks around major airports until July 1.

The Transportation Department, relying on information from airlines, says more than 80% of the U.S. fleet has been retrofitted, but Buttigieg said Friday that “some operators still have work to do.”

Buttigieg threatened to sanction airlines for deceptive trade practices if they schedule more flights than they can operate with retrofitted planes.

Airlines for America, which represents the largest U.S. carriers, said its members are working hard to equip planes with up-to-date radio altimeters, but there is a shortage because of global supply-chains problems.

“Carriers have repeatedly communicated this reality to the government,” said Marli Collier, a spokeswoman for the group. “Nevertheless, thanks to careful planning, A4A member carriers are confident in their ability to maintain the integrity of their schedules, despite the impending deadline.”

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Buttigieg warns airlines to finish retrofitting planes to avoid interference from 5G signals (2023, June 24)
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