Document ID: chunk:federal_register_of_legislation:F2018C00889:reg:22:p15
Version: federal_register_of_legislation:F2018C00889
Segment Type: reg
Provision Reference: reg 22 (pt 15/26)
Character Range: 207100–209997

C, Appendix 1, Radius to Fix (RF) Path Terminator.
Note   The system performance and functional requirements for RF Path Terminator operations are replicated in clauses 5 and 6 of this Appendix.
       4.2For paragraph 4.1 (a), an RNP system with an RF path terminator function must meet the requirements of at least 1 of the following:
(a) FAA AC 90-105 — Approval Guidance for RNP Operations and Barometric Vertical Navigation in the U.S. National Airspace System;
(b) FAA AC 90-101A — Approval Guidance for RNP Procedures with AR;
(c) FAA AC 20-138B — Airworthiness Approval of Positioning and Navigation Systems;
(d) EASA AMC 20-26 — Airworthiness Approval and Operational Criteria for RNP Authorisation Required Operations;
(e) an approval issued by the National Aviation Authority of the aircraft's State of Operation or Registry, and which is assessed by CASA as meeting requirements that are the same as, or equivalent to, the requirements of paragraph (a), (b), (c) or (d) of this clause;
       (f) a CASA assessment of the aircraft which results in a CASA determination that the aircraft meets the standards for eligibility set out in the paragraphs of this clause.
       4.3The flight manual or referenced airworthiness eligibility document must contain the following information:
       (a) a statement indicating that the aircraft meets the requirements for RNP operations with RF Legs and has demonstrated the established minimum capabilities for these operations. This documentation should include the phase of flight, mode of flight (e.g. FD on or off, and/or AP on or off, and applicable lateral and vertical modes), minimum demonstrated lateral navigation accuracy, and sensor limitations, if any;
       (b) any conditions or constraints on path steering performance (e.g. A/P engaged, FD with map display, including lateral and vertical modes, and/or CDI/map scaling requirements) should be identified. Use of manual control with CDI only, is not allowed on RF Legs;
       (c) the criteria used for the demonstration of the system, acceptable normal and non-normal configurations and procedures, the demonstrated configurations and any constraints or limitations necessary for safe operation.

5 RF path terminator system performance
       To meet the requirements of clause 4 above, an eligible aircraft's RF path terminator system must meet 1 of the following performance standards:
(a) the performance requirements set out in one of the documents listed in subclause 4.2 of this Appendix;
(b) a demonstration to CASA that the navigation system has the capability to execute leg transitions and maintain track consistent with an RF Leg between 2 fixes. The lateral TSE must be within ±1 × RNP of the path defined by the published procedures for at least 95% of the total flight time for each phase of flight and each autopilot and/or flight director mode requested.

6 RF