Dual FMC required for RNP APCH B737NG?

[unkki]

Hello,

Is a dual FMC required for RNP APCH on the B737NG? We have some airplanes with 1x FMC.

In the FCOM there is SP 4.6 about RNP APCH (AR), but not about RNP APCH. The SP requires 2x FMC but does a normal RNP APCH also require 2x FMC?

Practical example, if the Jeppesen approach chart says RNP APCH with a LNAV and a LNAV/VNAV minima. Does this approach require a dual FMC setup to be flown?

Thanks in advance!