Originally Posted by
Too Few Stripes
RNP value changes relative to where you are on the approach, not whether you are in on-approach logic.
It depends on the type of arrival and approach. A conventional arrival based on navaids to an ILS approach is unlikely to have the RNP coded into database, so the FMC would default to standard values and you would be able to see the transition to VNAV approach logic in terms of RNP.
However, in case of RNAV/RNP arrivals, the RNP is most likely coded for each leg already, so the RNP displayed will be what is required for current leg, rather being dependant on FMC to figure it out on its own. With FMC U11 and onwards, you can see the coded RNP for the legs by selecting DATA on the EFIS control panel.