The Russian Federal Air Transport Agency (Rosaviatsiya) has issued PJSC Yakovlev approval for a major modification to the MC-21 type design. The change authorizes the use of domestically produced polymer-composite materials in the structural elements of the vertical and horizontal stabilizer box beams. According to UAC’s press service, this approval finalizes the replacement of foreign composites in the aircraft’s tail assembly.
Certification work was completed in December 2025. Specialists from the Russian Air Register, the certification centers of the Federal State Unitary Enterprise GosNII GA, FAU TsAGI, LLC SC “MATERIAL,” and JSC NMC NORMA participated in the process. Compliance verification included computational analyses, modeling, and full-scale tests.
Mass production of the vertical and horizontal stabilizer box beams using Russian composites is carried out by JSC KAPO-Composite, part of PJSC Yakovlev’s AeroComposite structure. The company manufactures the tail structural components under the MC-21 program’s industrial cooperation framework.
Previously, in 2022, the type certificate was updated to include the installation of PD-14 engines and the use of wings made from Russian composites. With these changes, all foreign composite materials in the MC-21 airframe have been replaced with domestic alternatives.
This milestone represents a key step in preparing the import-substituted version of the aircraft for commercial service. PJSC Yakovlev, in coordination with Rosaviatsiya, is currently certifying configurations equipped with new domestic avionics and systems.
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