Here's the link to the preliminary report on this incident.
http://www.dephub.go.id/knkt/ntsc_av...t%20PK-DAL.pdf
Strange to read the license type for the co-pilot (and pilot flying) was given, not as 'CPL' or 'ATPL', but as '3443263' . And no, that's not the license number as Indonesian licenses only have 4 digits. So what kind of license is that?
Another strange observation is the expiry date of the co-pilot's instrument rating. It's not listed there at all. Begs the question why they have left this information out of the preliminary report, where as the captain's details are complete? And I take it, that his age, listed as '24 hours', is a typo.