• Russia's MC-21-310 completed 28 flights and 107 hours of testing in September 2026.
• Four aircraft were used for testing, with MC-21-310 73057 logging the most hours.
• Testing focused on systems including air conditioning and fuel systems.
• Aeroflot signed a contract for 90 additional MC-21 aircraft.

The MC-21-310's progress may indicate Russia's growing capability in domestic aircraft production, which could reduce reliance on foreign suppliers. The intense flight testing suggests a focus on meeting certification requirements, which could pave the way for commercial deliveries and may impact the global aircraft market.