Hi guys
just a quick question about the REQUIRED NAV PERF NOT AVAILABLE message on the CDU during an RNAV- LNAV approach.
what is the sequencing/scale down of the rnp during the approach rnp-wise that should the anp exceed it will trigger the message preventing the approach from being continued? In my previous ariplane - the crj - it was rnp1 25nm from the airport reference point, 0.3 2nm prior to faf, 1 from map to missed approach fix and then back to the route rnp.
many thanks