The white smoke may be from a defective flow divider, dump valve.
This will often cause white smoke to appear, usually after shutdown as the fuel which dribbles into the can cooks off.
Possibly it may be jammed to the all nozzle position and causing the hot starts. Remember pratts are in the business of selling engines. not making them last forever. Temprature is your enemy unless you have deep pockets. Consider reducing max climb and cruise temps a bit.