What happened
The aircraft was operating at a cruising altitude of 8,000 feet over the mountainous terrain of Arunachal Pradesh when the crew reported significant difficulties maintaining situational awareness. Due to deteriorating weather conditions characterized by heavy rainfall, the pilot lost orientation and was unable to determine the aircraft's position. The captain attempted to verify visibility with air traffic control by asking if they could see the aircraft's navigation lights, but received a negative response. Approximately thirty seconds after this communication, the aircraft impacted a mountain slope. The collision resulted in the destruction of the airframe and the fatalities of all four occupants on board.
Findings
The accident occurred during the cruise phase of flight. The primary contributing factor was the loss of pilot orientation caused by poor visibility from heavy rain. The crew's inability to locate their position despite contacting ground control led directly to the controlled flight into terrain.