In the ongoing turmoil of how the launch of wireless broadband networks would interfere with radar altimeters in commercial and business aircraft, the Federal Aviation Administration (FAA) released Special Airworthiness Information Bulletin (SAIB) AIR-21-18 Nov. 2.
The SAIB cautions manufacturers and operators of the planned deployment of wireless broadband networks on Dec. 5 and the potential hazardous effects to radio altimeter accuracy. The FAA recommended that “aircraft and radar altimeter manufacturers and operators, voluntarily provide to federal authorities specific information related to altimeter design and functionality, specifics on deployment and usage of radio altimeters in aircraft, and that they test and assess their equipment in conjunction with federal authorities.”
The same day, the “Aviation Community” – a group of 21 – including aircraft organizations, such as the National Business Aviation Association (NBAA), Aircraft Owners and Pilots Association (AOPA), General Aviation Manufacturers Association (GAMA), Aircraft Electronics Association (AEA), as well as avionics and aircraft manufacturers sent a letter to the Secretary of the Federal Communications Commission (FCC) Marlene H. Dortch requesting a group with representatives from the FCC, FAA, 5G interests and the aviation industry be formed to address concerns and address unanswered questions regarding aviation safety.
Shortly thereafter, AT&T and Verizon confirmed that they had agreed to put a hold on rolling out 5G service and will work with the FAA to address concerns about potential interference with aircraft cockpit safety devices and ground towers transmitting 5G signals.