en.Wedoany.com Reported - Russia's Yakovlev has restructured the in-service support system for the SSJ100 commercial airliner to address maintenance and supply chain challenges arising from the withdrawal of Western original equipment manufacturers after 2022.
The SSJ100 was initially developed as the first Russian-designed and certified commercial airliner of the post-Soviet era. Although a domestic project, its early development aligned with the requirements of the European Aviation Safety Agency and the U.S. Federal Aviation Administration, targeting export markets, which led to extensive international industrial participation, including consulting from Boeing during development and the integration of numerous Western subsystems. Key aircraft systems were sourced globally, encompassing Thales avionics, Safran landing gear components, Liebherr flight control equipment, Parker hydraulic systems, Hamilton Sundstrand power generation units, and Honeywell auxiliary power units. While this configuration ensured certification compatibility with Western standards, it also made the aircraft type long-term dependent on external OEM support for continued airworthiness.
Following the imposition of Western sanctions, Yakovlev assessed the impact on fleet continuity, initially believing that without external support, the SSJ100 fleet could be gradually grounded by the end of 2024. This forecast has been revised as domestic support capabilities have expanded. In response, Russia established a dedicated in-service support architecture for the SSJ100, encompassing the transfer of engineering authority, document revisions, domestic spare parts procurement, and local repair capabilities for imported systems, replacing the original OEM support chain with a national-level engineering and maintenance structure.
Regulatory changes underpinned this shift. New regulations permit the continued operation of foreign-designed components without OEM technical support, establish domestic responsibility for design changes affecting continued airworthiness, and create an engineering oversight mechanism for legacy imported systems. In 2025, additional legislation authorized the use of Russian-manufactured spare parts in the maintenance of Western-origin aircraft systems. Yakovlev has signed engineering support agreements with approximately 170 Russian industrial entities. The number of imported systems covered by domestic engineering authority has increased from zero in early 2022 to 358 by mid-2026. Over the same period, Russia's domestic maintenance capability has expanded from 59 component types to 510.
The support model is structured into three tiers. The fastest tier involves pin-to-pin replacement with domestic equivalent components, requiring no aircraft modifications. The second tier covers component integration developed for the import-substituted SJ-100 configuration, requiring limited airframe or system adaptation. The longest development cycle, spanning two to four years, applies to newly designed domestic alternatives for legacy Western-origin equipment. Additionally, a parallel effort focuses on establishing domestic overhaul and repair capabilities for imported components previously requiring return to foreign OEMs, enabling the maintenance of units that were once dependent on external repair cycles.
A mid-term assessment conducted in late 2023 estimated that approximately two-thirds of the SSJ100 fleet (excluding the Russian-French propulsion system) could remain operational until 2030. Yakovlev's latest forecast raises this figure to nearly 85%, reflecting the cumulative effect of expanded domestic support scope and repair capabilities.
