Incident Overview
While en route from Bandung to Jakarta, the flight crew received clearance to descend from 6,500 feet to 4,500 feet. However, minutes later, the twin-engine aircraft was observed flying at an altitude of 2,700 feet when it struck the slope of Mount Cemonyet, located approximately 64 kilometers southeast of Jakarta. The impact destroyed the aircraft and resulted in the deaths of all 13 occupants.
Investigation Findings
The official investigation determined that the crew initiated the descent prematurely for reasons that remain unknown. This early descent caused the aircraft to go below the minimum safe altitude for the area. Additionally, poor weather conditions, which reduced visibility, were cited as a contributing factor to the accident.
Conclusion
The accident highlights the consequences of descending below prescribed altitudes without clear rationale. The lack of visibility due to adverse weather compounded the risk, ultimately leading to the collision with terrain.