12/24/2023 0 Comments Unreal network radarThe AD requires the following Airplane Flight Manual (AFM) revision that prohibits the following operations in the presence of possible 5G interference:įigure 1 to paragraph (g)-AFM Revision (Required by AD ) Radio Altimeter Flight Restrictions On December 9, 2021, the FAA issued an Airworthiness Directive (AD) covering all transport category aircraft.Updates were published on Decemand October 18, 2022. On November 2, 2021, the FAA issued a special airworthiness information bulletin (SAIB) alerting operators to the potential for severe restrictions in flight operations to ensure safety.This is in addition to radio altimeter use for autoland and in Category (CAT) II/III and Required Navigation Performance (RNP) AR approaches. There have been fatal accidents associated with incorrect radar altitude, most recently Turkish Airlines Flight 1951 in Amsterdam in 2009.Īltitude information derived from radar altimeters has been deeply integrated into aircraft systems and automation, with the latest aircraft using it to change aircraft handling qualities and prepare systems such as ground spoilers and thrust reversers for deployment prior to touchdown. Radar altimeter interference from 5G signals can take the form of loss of radar altitude information or, worse, incorrect radar altitude information unknowingly being generated. Canada has convened a 5G Radar Altimeter Working Group within the Radio Advisory Board of Canada to work through what operational limitations would apply on both mobile wireless and aviation to ensure safety as Canada plans their 5G deployment. The goal of these upgrades is to eliminate the current Alternate Methods of Compliance (AMOCs) and their associated airport/runway lists that are cumbersome and difficult for airlines and pilots to manage, but it is too soon to tell whether this goal can be met for all aircraft by July 2023.Ĭanada has also approved 5G in the C-Band, but with restrictions against using C-Band in the vicinity of 26 airports and other measures to ensure aviation safety. FAA continues to work with both industries on resolving the significant outstanding issues for the remaining airline fleet for July 2023. In conjunction with mobile wireless’s extension, FAA has received commitments from operators of the lowest performing radar altimeters (Embraer regional jets and certain legacy aircraft equipped with particular models of radar altimeters) to upgrade them with Radio Frequency (RF) filters by January 2023. This will prevent significant disruption after July 5, 2022, when the original agreement was due to expire. Mobile wireless industry has committed to continue current voluntary limits until January 2023, and relaxed limits until July 2023. On Friday June 17, 2022, FAA convened a meeting of key aviation stakeholders including ALPA to inform them of FAA’s strategy for future co-existence with C-Band 5G transmissions. After high-level talks, mobile wireless has agreed with the Federal Aviation Administration (FAA) to delay broadcast of C-Band 5G until January 19, 2022, and placed voluntary limitations to C-Band 5G deployment until July 5, 2022, to permit continued access to airport by a substantial portion of the airline fleet. In the United States, wireless broadband deployment was originally scheduled to begin on December 5, 2021. This approval was made despite the aviation industry informing the FCC since 2018 of the need to ensure that radar altimeters are protected from 5G interference. The 5G signals in the United States are at higher power levels than any other deployment currently in use elsewhere in the world and also with closer proximity to airports. In early 2021, the Federal Communications Commission (FCC) awarded the mobile wireless industry radio spectrum to operate 5G transmissions in the “C-Band,” or 3.7-3.98 GHz, adjacent to the spectrum used by radar altimeters. Aircraft Operations and Radar Altimeter Interference from 5GĪs this is a developing situation, ALPA will update this page with additional operational resources and information for pilots as they become available.
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