The developers of the MC-21 aircraft have created a comprehensive operational support system, including maintenance, documentation preparation, logistics, and spare parts provision. The work was carried out by the operational support department of the MC-21 Design Bureau, which is part of the Yakovlev company.

A modern passenger aircraft requires not only design and production but also a full-fledged infrastructure for further operation. Therefore, specialists from the MC-21 Design Bureau began forming a technical support system already at the aircraft's design stage.

One of the key areas was the development of ground support equipment and operational documentation. Engineers create technical solutions that allow routine maintenance to be carried out safely and with minimal time expenditure.

Special attention is paid to integrated logistical support for the aircraft. Specialists form databases for components, calculate the supply structure, and prepare solutions that will help airlines maintain the necessary stock of parts and equipment.

In addition, the department participates in the MC-21 certification procedures and ensures the aircraft's continued airworthiness after the start of operation. Engineers analyze the convenience of technical maintenance, assess the accessibility of units, and propose changes that can reduce repair time.

Another important area was the preparation of technical materials for aircraft operation. These materials establish maintenance requirements, rules for using documentation, and procedures for managing technical information.