What happened
While traveling from Balikpapan to Kuching, the flight crew observed a warning light indicating low oil pressure in the left engine. In response, the crew deactivated the left engine and feathered the propeller. Because of adverse weather conditions at the destination of Kuching, the pilot opted to divert to Simanggang.
The aircraft landed safely on a single engine at Simanggang. However, during the deceleration phase, the pilot performed a 180-degree turn followed by a backtrack procedure. During this maneuver, one of the landing gear components sank into soft ground near the edge of the runway.
After replenishing the oil in the left engine, the crew attempted a second departure for Kuching. Shortly after liftoff, during the initial climb, a new warning light appeared on the cockpit panel signaling a malfunction in the right engine's feathering system. The aircraft type began oscillating laterally before losing altitude and impacting a jungle area situated 1,400 meters beyond the runway threshold. The impact resulted in the total destruction of the plane and three injuries among the crew.
Findings
- A malfunction involving the feathering system on the right engine occurred during the climb phase.
- Soft ground at the runway edge contributed to a landing gear excursion during the initial diversion landing.