Federal Register #20261316

FAA Mandates Flight Manual Revisions for Boeing 757/767 Due to 5G Interference in Canadian Airspace

The Federal Aviation Administration (FAA), under the Department of Transportation, has issued an airworthiness directive (AD) for all Boeing 757 and 767 airplanes regarding 5G interference in Canadian airspace. - Government Buyer: - Federal Aviation Administration (FAA), Department of Transportation - Office: Aircraft Certification Service, Integrated Certificate Management Division - OEM Highlight: - The Boeing Company is the only OEM referenced - Products/Services and Quantities: - Mandatory revision of the Airplane Flight Manual (AFM) for 1,084 U.S.-registered Boeing 757 and 767 airplanes to include operational limitations for dispatch, approach, landing, and go-around in Canadian airspace if the aircraft is not radio altimeter tolerant - Optional modification to upgrade radio altimeters to models tolerant of 5G interference (estimated cost up to $120,000 per airplane) - Optional installation of interference-mitigating filters (estimated cost up to $14,040 per filter) - Notable Requirements: - Distinction between radio altimeter tolerant and non-tolerant airplanes; only non-tolerant aircraft must comply with new AFM limitations - No new product procurement is mandated, but operators may choose to upgrade altimeters or add filters to remove operational limitations - The directive is an interim action and may be updated if the Canadian 5G environment changes - The AD is effective starting July 1, 2026, and compliance is required before further flight in Canadian airspace

Description

The FAA is adopting a new airworthiness directive (AD) for all The Boeing Company Model 757 and Model 767 airplanes. This AD addresses interference from wireless broadband operations in the 3.7-3.98 GHz frequency band (5G Lower C-Band) in Canadian airspace, which affects radio altimeters and certain airplane systems during approach, landing, and go-arounds. The directive requires revising the airplane flight manual (AFM) to incorporate limitations prohibiting certain operations requiring radio altimeter data when operating in Canadian airspace. The AD aims to mitigate increased flightcrew workload and ensure safe flight and landing of the airplanes.

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