Go Around
How about:-
NPA - auto throttle not used. Go around attempted (for whatever reason) by pushing TOGA switch but no follow up on levers to ensure TOGA engages (forgetting that they were in Manual Thrust).
Pure speculation of course.
However it is true that Indonesian aviation is rotten to the core. Poorly trained pilots with little personal discipline or standards. I know, I've had to try to train some of them not so long ago, all with thousands of hours and unable to fly basic IF. Corrupt officials all the way to the top. EU foolishly allowed Garuda back into Europe saying that the Authority was now conducting proper supervision of all operators which we all know is laughable. This is the same Authority that allows Merpati to still hold an AOC even though they've had a fatal accident virtually every year for the past twenty or so years.