EASA AD US-2026-13-15
Jul 1, 2026Navigation - 5G C-Band wireless Broadband Interference with Radio Altimeter System when operating in Canadian airspace - Amendment
The document titled "Navigation - 5G C-Band wireless Broadband Interference with Radio Altimeter System when operating in Canadian airspace - Amendment" is a Federal Aviation Administration (FAA) final rule airworthiness directive (AD 2026-13-15) addressing interference issues affecting radio altimeters on various Boeing aircraft models including 707, 717, 727, DC-8, DC-9, DC-10, MD-10, MD-11, MD-81 through MD-88, and MD 90-30 airplanes. This AD responds to increased 5G Lower C-Band wireless broadband interference in Canadian airspace that compromises radio altimeter reliability and the proper functioning of critical airplane systems during approach, landing, and go-around phases. The directive mandates revisions to the airplane flight manual (AFM) to restrict certain operations dependent on radio altimeter data when operating in Canadian airspace.
Airworthiness Directive
- Boeing 707
- Boeing 717
- Boeing 727
- Boeing DC-10
- Boeing DC-8
- Boeing DC-9
- Boeing MD-10
- Boeing MD-11
- Boeing MD-88
- Boeing MD-90
- McDonnell Douglas DC-8
- McDonnell Douglas DC-9
- McDonnell Douglas DC-10
- McDonnell Douglas MD-10
- McDonnell Douglas MD-11
- McDonnell Douglas MD-81
- McDonnell Douglas MD-82
- McDonnell Douglas MD-83
- McDonnell Douglas MD-84
- McDonnell Douglas MD-85
- McDonnell Douglas MD-86
- McDonnell Douglas MD-87
- McDonnell Douglas MD-88
- McDonnell Douglas MD-90-30