Main Responsibility of FCC-442 is to provide autopilot functionality to the air vehicle it is mounted. FCC-442 has all the interfaces which are required to control a rotary wing air vehicle and two powerful CPUs to control these interfaces.
FCC-442 consists of RTCA-DO-254 Level A certifiable hardware and RTCA DO-178C Level A certifiable BSP and driver software for Green Hills Integrity-178 TUMP and Wind River WxWorks 653 real-time operating systems
FCC-442 has two lanes which has identical IO functionality and dissimilar CPU and Operating Systems. Both lanes are functional during flight. Lanes either manage the autopilot functionality or monitor the other lane. Dissimilar CPU and RTOS architecture reduces to possibility of common mode failure based on CPU or RTOS.
Power isolated interfaces groups, Built-in-Test capabilities, dual redundant architecture, dissimilar CPUs and rugged designed hardware provides reliable and safe operation for FCC-442 during the flight.