Hello everyone,
I tried to do a datum transformation. Topographic maps in Indonesia published prior to 1996 use the Indonesian Datum 1974. Taking the crash location coordinates (from the Sergey Dolya pictures) and transforming the coordinates into WGS84 (the GoogleEarth Datum) gives you 6°42'37.04'' S and 106°44'42.09''E as new crash coordinates.
I hope this helps.