If either a TCDS or STC states only a specific prop, i.e. DCM69/48 and specific static rpm, i.e. 2350-2450 are allowed, is it legal to re-pitch from the /48 to achieve the desired static RPM?
Does that change the designation of the prop, i.e. to a 69/50 if static was too high, or 69/46 if...