Document ID: chunk:federal_register_of_legislation:F2018C00889:reg:5:p44
Version: federal_register_of_legislation:F2018C00889
Segment Type: reg
Provision Reference: reg 5 (pt 44/51)
Character Range: 142006–144990

serviceable
       8.10Before an RNP AR operation commences, the required equipment must be serviceable and its serviceability confirmed.

 Note   A list of required equipment should be readily available to the flight crew on the flight deck.
       Autopilot and flight director
       8.11The standard method of flight control for RNP AR operations is autopilot coupled. However, the use of a flight director instead of the autopilot is acceptable if:
(a) the aircraft manufacturer's recommended operating procedures permit such use of the flight director; and
(b) the operator has provided each member of the flight crew with:
           (i) guidance on when a flight director may be so used; and
           (ii) training in the conduct of RNP AR operations using the flight director; and
(c) the operator has demonstrated to CASA that when the aircraft is flown with the flight director, FTE can be maintained within the permitted tolerances during all normal, rare-normal and non-normal circumstances.
Note   The FTE used by the aircraft manufacturer to demonstrate RNP capability may be dependent upon the use of a coupled autopilot. A lesser RNP capability may be applicable to procedures flown using the flight director.
       RNP selection
       8.12Before an RNP AR operation commences, the appropriate RNP must be entered into the FMC and its appropriateness and accurate entry confirmed.
Note   The appropriate RNP is determined by the flight crew after consideration of the published DA (or multiple DAs), the weather and other ambient conditions, the current RNP service, and the predicted RNP service. For RNP AR procedures designed in accordance with proprietary design criteria for use by operators of Australian aircraft, other than a system default value, RNP is not extracted from the navigation database.
       GNSS updating
       8.13.1 Before an RNP AR operation commences, GNSS updating must be operating and such operation confirmed.
       8.13.2 Unless the AFM requires otherwise, if GNSS updating is lost during an approach, the approach may be continued if the navigation system continues to provide a solution consistent with the selected RNP.
Note   The AFM may require an approach to be discontinued in the event of a loss of GNSS updating in which case the approach must be discontinued.
       Track deviation monitoring
       8.14.1 Deviation from the defined lateral path must not exceed 1 x RNP at all stages of flight.
       8.14.2 To ensure compliance with subclause 8.14.1 of this Appendix, the operator's procedures must provide for the following:
(a) monitoring lateral tracking;
(b) track deviation alerts and callouts;
(c) flight crew intervention;
(d) regaining track;
(e) discontinuing the operation.
Note   RNP AR procedures designed in accordance with proprietary design criteria for use by operators of Australian aircraft require that the standard for track-keeping is applied during turns and no allowance is made for overshoot