Incident
En route from Wamena to Jayapura, the flight crew encountered technical problems with the hydraulic system, resulting in a loss of pressure. Despite this issue, a normal approach was executed and the aircraft landed at Jayapura-Sentani Airport. While rolling at a speed of approximately 60 knots, the aircraft deviated to the left, veered off the runway, and came to rest in a ravine.
Occupant and Damage
All 28 occupants escaped uninjured. The aircraft sustained damage beyond repair.
Probable Cause
The official investigation determined that the brakes partially failed upon landing due to a loss of hydraulic pressure for unknown reasons. Additionally, the crew failed to use the auxiliary system, which may have provided more braking power.