14 CFR · Part 121
14 CFR § 121.326
Radio Altimeter Systems.
After December 30, 2030, unless otherwise authorized by the Administrator, no person may operate an aircraft under this part in the airspace of the 48 contiguous United States and the District of Columbia with a radio altimeter unless the radio altimeter system meets the performance requirements of § 91.220(b) of this chapter.
Regulations Referenced
Reflects the eCFR edition current as of September 29, 2026. Retrieved from ecfr.gov on October 16, 2026.
Primary Source