RNP specification required for U.S. FAR Part 97 RNAV (GPS) approach?
Hello!
In the United States, can an aircraft utilizing avionics with an RNAV-only specification (no RNP specification) shoot a standard FAR Part 97 RNAV (GPS) procedure? ICAO would classify this as an RNAV (RNP) non-AR approach.
My first thought was yes, of course they can. The RNAV (GPS) LNAV only level of service is now replacing the traditional stand-alone GPS procedure. But the further I research, I'm not so sure. The nav structure is RNP specific (1.0 initial and intermediate, 0.3 final), so full-scale deflection of the CDI on the final segment would violate the RNP-0.3 performance requirement.
If an RNP specification is required, then the unit must have onboard performance monitoring and alerting for this type of approach.
Any information you can provide would be helpful. Thank you.