Fatal accident involving Lun aircraft in Ryazan Oblast

1 fatality • РФ, Рязанская область, Александро-Невский район, н. п. Зимарово

A fatal accident occurred on September 4, 2025, involving a Lun aircraft, registration RA-0464A, during a ground test run in Zimarovo, Russia. The aircraft became airborne and struck the ground, resulting in the death of the pilot.

On September 4, 2025, at approximately 07:40, a Lun aircraft, registration RA-0464A, was involved in a fatal accident in the settlement of Zimarovo, Alexandrovsky District, Russia. The aircraft had been delivered in a disassembled state to the location on August 26, 2025, and was assembled by the owner and the pilot.

Following the assembly, the pilot and the owner prepared the aircraft for testing and taxiing between September 3 and September 4, 2025. During the testing phase on September 4, the pilot taxied the aircraft from the assembly platform to a paved road to perform a test run intended to verify engine operation and aircraft systems.

During this test run, surveillance footage recorded the aircraft separating from the ground and subsequently colliding with the ground. The impact resulted in the destruction of the aircraft and the death of the pilot. No fire occurred at the scene, and there were no injuries or damage to persons or property on the ground.

The aircraft, registration RA-0464A, had been transferred to the pilot via a vehicle lease agreement without crew dated September 1, 2025.

Probable cause

The accident was caused by the improper installation of cable wiring in the aircraft's longitudinal control system, specifically the reversal of attachment points. This error led to a loss of pitch control after takeoff, causing the aircraft to exceed critical angles of attack and stall. Contributing factors included a control system design that allowed for incorrect connections, a failure to detect the improper installation during post-assembly inspections, and design deficiencies that prevented the pilot from verifying correct elevator deflection during pre-flight checks without external assistance.

Frequently asked questions

What happened in the 2025-09-04 Лунь accident near РФ, Рязанская область, Александро-Невский район, н. п. Зимарово?

A fatal accident occurred on September 4, 2025, involving a Lun aircraft, registration RA-0464A, during a ground test run in Zimarovo, Russia. The aircraft became airborne and struck the ground, resulting in the death of the pilot.

Were there any fatalities in the 2025-09-04 Лунь accident?

The accident was fatal, resulting in 1 fatality.

What aircraft was involved and where did it happen?

The accident on 2025-09-04 involved a Лунь, registration RA-0464A, operated by Частное лицо, at РФ, Рязанская область, Александро-Невский район, н. п. Зимарово.

What was the probable cause of the accident?

The accident was caused by the improper installation of cable wiring in the aircraft's longitudinal control system, specifically the reversal of attachment points. This error led to a loss of pitch control after takeoff, causing the aircraft to exceed critical angles of attack and stall. Contributing factors included…

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