Thanks.
Unable RNP,or "unable required nav perf" and other fmc sratchpad messages such,"FMC disagree" are clear cut mandatory go arounds.
.How about A/P failure or F/D failure before or after the FAF?
The 737 allows AP off with FD ON or AP ON with FD OFF.
Does you airline allow such configuration before the FAF? or only to continue after having passed the FAF?
.Prior to a GNSS approach,a loss of GPS receivers(GPS light in 737) before the FAF,for example 20 NM..while the ANP remains in the RNP,does your airline allow you continue beyond the FAF?