What happened
At 04:28 UTC, while undergoing maintenance on a Ka-32S helicopter registered UR-CIT, the crew initiated a ground test of the powerplant. During the transition of the right engine to takeoff mode, the airframe experienced vibrations with increasing amplitude. The commander attempted to reduce engine power and shut down both engines, but the oscillations continued to intensify rather than subside.
As a result, the crew lost all control authority over the helicopter's flight controls. A fire subsequently broke out in the vicinity of the right engine. The commander activated the onboard fire suppression system and disconnected the battery banks. Maintenance personnel attempted to extinguish the flames using an OU-2 portable fire extinguisher, but these efforts were unsuccessful.
The crew immediately initiated an emergency evacuation to a safe zone. Approximately two to three minutes later, the fire spread rapidly from the right side of the helicopter. Fire and rescue units from the airport arrived shortly thereafter and began firefighting operations. Despite these measures, the helicopter sustained significant damage and was ultimately destroyed by the fire.
The investigation
The incident is classified as a serious accident under Article 1, Part 1, Clause 63 of the Air Code of Ukraine. Consequently, it falls under the jurisdiction of the National Bureau of Air Accident Investigation (NBAAI) in accordance with Cabinet of Ministers Resolution No. 610 dated May 20, 2022.
Following coordination with the designated investigation authority of Malaysia, the NBAAI commenced its safety investigation into the serious accident. The Malaysian authority appointed a designated representative to assist during the investigative process.