What is this light passenger prop airplane which crash landed in East Kalimantan, Borneo in 1983?
That registration looks like PK-DCR to me. It's a little bit blurry, but especially if you zoom in, it's fairly readable.

A quick web search for that registration and "airplane" brings me Wikipedia's page on Deraya Air Taxi, which indicates that


  On November 1982, Indonesian Aerospace 212-100 PK-DCR of Deraya Air Taxi and PT Pupuk Kaltim was damaged when it approaching Bontang. No fatalities in this accident.


The 212-100 brings us to the CASA C-212 Aviocar.

Looking at the pictures on Wikipedia, it's pretty close, so that's probably it. Note the pretty distinctive tail section, and the relative dimensions:


(source; photo by RuthAS, published under CC-BY-3.0)


(source; photo by John Wheatley, published under under GFDL-1.2)