FAA Supplemental Type Certificates Received For RA-4500 MK II Radar Altimeter FreeFlight Systems has received FAA Supplemental Type Certificates (STCs) for radar altimeter installation on the Bell 407 and Airbus AS350 helicopters. The FAA also issued corresponding alternative methods of compliance (AMOCs), confirming the approved configurations meet the requirements of FAA AD 2023-11-07 for radio altimeter tolerance in the 5G C-band environment. Radar altimeter performance remains a key focus for regulators, operators and maintenance, repair and overhaul across the rotorcraft community. These approvals expand compliance options for two of the most widely operated light single-engine helicopter platforms, helping reduce uncertainty and simplify installation planning and compliance documentation for mixed fleets.
