You can not load 189 passengers wrongly on a 737. It is the maximum capacity, so that weight distribution is always within limits. The fuel will also never cause any problems either with a full pax load, because of design.
Leaves the luggage. Knowing that indonesians will carry fairly bulky stuff with them,I dont see how the cargo compartments could not be full. This would imply an evenly distributed load among all 4 compartments.
—> this will not turn out to be a load distribution accident. I go for pitot covers as well.