Document ID: chunk:federal_register_of_legislation:F2018C00889:reg:5:p43
Version: federal_register_of_legislation:F2018C00889
Segment Type: reg
Provision Reference: reg 5 (pt 43/51)
Character Range: 139181–142300

of this Appendix, before an RNP AR operation commences, availability of an RNP service must be predicted, taking into account relevant matters, including all of the following:
(a) aerodrome location;
(b) approach or departure operation;
(c) terrain masking;
(d) satellite serviceability (NOTAMs);
(e) installed avionics algorithms.
       8.3 Subclause 8.2 of this Appendix does not apply if the aircraft can achieve LNAV accuracy that is at least equal to that required for the RNP AR operation using requisite GNSS satellites.
Note   Requisite GNSS satellites is defined in paragraph 4.2 of this Order.
       Radio updating
       8.4If radio updating may degrade the GNSS position, radio updating must be inhibited before commencement of the RNP AR operation.
       Procedure selection
       8.5An approach or departure procedure must be retrievable by procedure identifier from the aircraft navigation database.
       Procedure verification
       8.6Before an RNP AR operation commences, the following must be verified:
(a) that the correct approach or departure procedure has been selected;
(b) that the cockpit electronic displays correctly replicate the route, the waypoint sequence and significant operational details shown on the published IAL procedure chart.
       8.7 However, paragraph 8.6 (b) of this Appendix must not be complied with for an RNP AR operation that is an OEI procedure.
Note   Verification that cockpit electronic displays correctly replicate the route, the waypoint sequence and significant operational details shown on the published IAL procedure chart is specifically prohibited for an OEI procedure in order to avoid inadvertent activation of the wrong route.
       Procedure modification
       8.8.1The flight crew must not modify the loaded procedure.
       8.8.2The lateral path must not be modified, with the exception of:
(a) accepting a clearance to go direct to a fix in the approach procedure that is before the FAF and that does not immediately precede an RF Leg.
(b) changing the altitude and/or airspeed waypoint constraints on the initial, intermediate, or missed approach segments of an approach (e.g. to apply cold temperature corrections or comply with an ATC clearance/instruction).
       Vectoring
       8.9When vectored by an air traffic service, a procedure may be intercepted at a position inside the IAF but not later than the designated Latest Intercept Point (LIP), Final Approach Point (FAP) or Vertical Intercept Point (VIP), whichever occurs closest to the Final Approach Fix (FAF). However, descent on an approach procedure below the minimum vectoring altitude is not permitted until the aircraft is established within the vertical and lateral tolerances of the procedure, and the appropriate navigation mode is engaged.
       Required equipment to be 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