The flight-control system developed for Russia’s import-substituted Yakovlev SJ-100 Superjet has entered the final stage of certification, Rostec reported. Developed by enterprises of its Radio-Electronic Technologies Concern, the system is intended to replace foreign-supplied equipment and must be approved before integration into the aircraft and completion of the airliner’s certification programme.
The system transmits pilot commands to the aircraft’s flight-control surfaces and uses four independent, dissimilar control channels. The architecture is designed to preserve controllability after individual component failures and to provide greater protection in multiple-failure scenarios than simple duplication.
Over three years, engineers tested 500 products in 1,500 trials, covering more than 30 categories of environmental and qualification requirements. The programme included temperatures from -55 to 85°C, lightning impulses of up to 1,500 volts, vibration, icing, moisture, salt fog, dust, fire exposure, structural strength, service life, and software and hardware verification. Reported calculations put the system’s failure probability at approximately one occurrence per billion activations.
SJ-100 chief designer Kirill Kuznetsov described the test results as confirming compliance with safety requirements and readiness for use on the aircraft. The system’s final certification remains pending, and the available information does not establish that the aircraft has already received its full type certificate. The wider Russianized SJ-100 programme is targeting serial production and deliveries from 2027.