Service experience generally indicates that turbine engines are not susceptible to mixed phase or glaciated icing conditions, with the possible exception of two known potentially vulnerable engine design features. These two design features are (1) pronounced inlet bends (such as particle-separator inlets), or inlet flow reversals, where inlet flow can stagnate and accumulate ice, and (2) high solidity dual row front stage compressor stators that can be susceptible to non-aerodynamic ice buildup on the stator airfoils resulting in core airflow blockage. These two design features should either be avoided or carefully scrutinized by analysis and testing to assure their non-susceptibility to mixed phase or glaciated icing conditions.
I know it is a bit off topic but which jet engines fall into thise two categories?