Document ID: chunk:federal_register_of_legislation:F2018C00889:reg:22:p8
Version: federal_register_of_legislation:F2018C00889
Segment Type: reg
Provision Reference: reg 22 (pt 8/26)
Character Range: 188065–191025

current;
(b) verification of proper entry of the ATC-assigned route immediately after initial clearance from ATC to conduct the relevant A-RNP route;
(c) action to ensure the waypoints sequence, depicted by the navigation system, matches the route depicted on the appropriate charts and the assigned route.
       7.3 The following steps must occur:
(a) selection of a SID or STAR by route name from the on-board navigation database;
(b) confirmation that the selected route conforms to the charted route, or the route as modified through the insertion or deletion of specific waypoints in response to ATC clearances;
(c) determination that the aircraft meets all specified criteria for the selected route or procedure and comply with the performance requirements of this Appendix.
       7.4 Except in response to ATC clearances, the following must not occur:
(a) creation of new waypoints by manual entry; or
(b) making manual entry of latitude, longitude or rho/theta values; or
(c) changing an RNP SID or STAR database waypoint type from a fly‑by to a flyover or vice versa.
       7.5 The following checks and cross-checks must be made:
(a) a cross-check of the flight plan by comparing charts or other applicable resources with the navigation system flight plan and the aircraft map display (if applicable);
(b) if required, confirm the exclusion of specific navaids.
Note   Small differences between charted navigation information and displayed navigation data may be noted. Differences of 3 degrees or less due to the equipment manufacturer's application of magnetic variation or leg track averaging are operationally acceptable.
       7.6 For A-RNP routes, a moving map display, flight director or autopilot in LNAV mode must be used.
       7.7 Where a lateral deviation indicator is used, scaling must be selected suitable for the navigation accuracy associated with the route or procedure, for example, full scale deflection equals plus or minus the RNP value.
       7.8 Route centrelines must be maintained as close as practicable, as depicted by lateral deviation indicators or flight guidance, unless authorised to deviate by ATC or under emergency conditions.
       7.9 Brief deviations from the standard mentioned in subclause 7.8 are acceptable during and immediately after turns, but only to the minimal extent that accurate cross-track information may not be provided during the turn.
Note 1   Flight crew procedures and training should emphasise observance of turn anticipation commands and management of rate of turn.
Note 2   Piloting standards usually require the aircraft to be flown to maintain lateral deviation not exceeding half the current accuracy requirement (RNP value) or half the lateral deviation scale. Whilst this standard should be observed, pilots must also be aware that Navigation System Error + Flight Technical Error (lateral deviation) may not exceed the specified navigation accuracy. When carrying out approach