Sounds like Airbus does not have a problem, while some Boeing 777 and 787 have possible interference. The first 777 went into service in 1995, and more 777’s are being built today. The first 787 went into service in 2011.
This is a disagreement between the FCC and the FAA. The FCC decision to use the C-Band for 5G was only made 2 years ago, in March 2020, and at the time the FCC said further analysis was needed to determine if there was interference. The FCC is an independent agency, and the FAA reports to the Secretary of Transportation. I think the FCC should limit 5G deployment around airports to whatever the FAA decides is safe. The engineers at the FAA can sort out the engineering disagreements, and the telecoms should be paying the airlines to update vulnerable systems if they want more towers.
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Airlines disrupted worldwide by U.S. 5G ‘nightmare’, January 19, 2022
“The 777 last year was the second-most used widebody plane on flights to and from U.S. airports with around 210,000 flights… British Airways switched its daily flight to Los Angeles to an Airbus A380 from the usual Boeing 777 service”
https://www.reuters.com/business/aerospace-defense/airlines-…
Which aircraft models are affected by 5G interference in the U.S.?, January 19, 2022
“Although other aircraft types reportedly possess low risk, it seems that the Boeing 777 is at a higher risk of radio altimeter interference from 5G signals.”
https://www.airlive.net/which-aircraft-are-affected-by-5g-in…
Continued Airworthiness Notification to the International Community, January 14, 2022
“The FAA determined anomalies on Boeing Model 787-8, 787-9, and 787-10 airplanes due to 5G C-Band interference which may affect multiple airplane systems using radio altimeter data, regardless of the approach type or weather. These anomalies may not be evident until the airplane is at low altitude during approach… the presence of 5G C-Band interference can result in degraded deceleration performance, increased landing distance, and runway excursion.”
https://www.faa.gov/sites/faa.gov/files/2022-01/CAN-2022-01…
5G altimeter interference: aviation versus telecoms, December 23, 2021
“When the FCC auctioned off spectrum in the C-band — 3.7 GHz to 3.98 GHz – winners including Verizon and AT&T spent over $81 billion to acquire portions of that spectrum. The use of the C-band for 5G raised concerns from the aviation industry regarding possible interference with aircraft altimeters.”
https://www.5gtechnologyworld.com/5g-altimeter-interference-…
What Is The C-Band? The 5G Brawl Between Airlines And Telecoms, Explained, January 4, 2022
“in March 2020, the FCC announced it would reallocate much of the C-Band by adopting new rules… In an FCC auction ending in February 2021, 21 telecoms companies bid just over $81 billion for over 5,600 C-Band licenses in the U.S… The aviation industry has pointed out for several years that aircraft radio altimeters operate on C-Band frequencies.”
https://www.forbes.com/sites/suzannerowankelleher/2022/01/04…
The Government of the United States
https://www.usgovernmentmanual.gov/ReadLibraryItem.ashx?SFN=…
Assessment of C-Band Mobile Telecommunications Interference Impact on Low Range Radar Altimeter Operations, October 7, 2020
“On March 3, 2020, the Federal Communications Commission (FCC) released their Report and Order of Proposed Modification in the matter of Expanding Flexible Use of the 3.7 to 4.2 GHz Band… The FCC Report and Order acknowledged that further analysis is warranted to evaluate the potential for interference to radar altimeters”
https://www.rtca.org/wp-content/uploads/2020/10/SC-239-5G-In…
“Real-world evidence overwhelmingly confirms that C-band spectrum can safely be used for 5G, without causing harmful interference to aviation equipment.”
https://www.5gandaviation.com/wp-content/uploads/2021/11/Fac…