Originally Posted by
SomeDanceToRemember
Could this cause crashes? What mechanisms and procedures are there to prevent crashes if the radar altimeter malfunctions? What's the worst-case scenario?
Invalid data from the radio altimeter could have the most hazardous impact on automated systems used for low visibility approaches and landings. The AD is intended to prohibit the use of such systems in the proximity of 5G transmissions that could interfere with the radio altimeters. What this means is huge change in airline operations, even in good weather, because such systems are routinely used. If low visibility conditions exist, then certain Category 1, Category 2 and Category 3 operations could not be conducted, creating major backups and delays at the airports they are established for.