Here is the final report on this accident. CVR didn't work but evidence shows the flaps were fully retracted for takeoff yet captain seems to remember setting them according to his statement. Myteriously, the flap handle was in the 5° position, yet the flap system was determined to be fully functional. The CB to warn of an improper flap configuration would not "latch in" due to wear.
http://www.dephub.go.id/knkt/ntsc_av...l%20Report.pdf