Does a change in partial pressure for a gas-solid reaction, changes the equilibrium?
The equilibrium constant will stay the same at the same temperature.  If the pressure of one component of the system in question is changed, equilibrium will be reestablished by either an change in the relative rates of the forward and reverse reactions.  

Increasing the partial pressure of one reactant in this system will result in an increase in the rate of the forward reaction.  Pressure of both both reactants will be reduced until equilibrium is reestablished.