-
Insertion of a waypoint which is not originally in the procedure, (direct insertion on F-PLN A page or use of NEXT WAYPOINT function)
-DIR TO a waypoint which is not originally in the procedure (in this case, this implies that all F-PLN waypoints are outside the Departure Procedure).
A subsequent change of the selected Departure Procedure will therefore not delete the new inserted elements. If a selected Departure Procedure has been revised by any other Lateral revision than those defined above or by any vertical revision and this Departure is changed, the restringing of Departure deletes the pilot revisions.
Arrival procedure (Ref. Fig. 007) The only possible revised point for an arrival procedure selection is the destination waypoint (of primary or alternate F-PLN). The various elements of an arrival procedure are first strung together in this order: STAR-Enroute transition, STAR (STAR common route + STAR RWY transition), Approach transition and approach.
Departure Segment
Figure 006
Arrival Segment
Figure 007
A matching waypoint for the terminating point of the selected Enroute transition (if one exists) is searched downstream in the STAR; Enroute transition and STAR are strung at this point and any STAR leg prior to the identical waypoint is deleted. A list of compatible Approach transition is searched by comparing the first waypoint of all the Approach transitions to the selected runway with the successive waypoints upstream in the already strung Enroute transition STAR segment. If a matching waypoint exists, the Approach transition is compatible. If no Enroute transition is selected, the compatibility is established with the STAR (STAR common route
+ STAR RWY transition) segment. When an Approach transition is selected, it is strung with the selected Approach. For this, a matching waypoint for the last point of the Approach transition is searched downstream in the Approach; Approach transition and Approach are strung together at the matching point ignoring any leg of the Approach prior to the identical point. If no matching point is found, a DISCONTINUITY exists between the Approach transition and the first fix of the approach. The Approach transition - Approach segment is then strung to the Enroute transition-STAR segment at the matching waypoint,
i.e. a matching point for the first point of the Approach transition is searched, upstream in the Enroute transition-STAR segment. Stringing occurs at the matching point ignoring any leg of the Enroute transition-STAR segment beyond the identical point. A matching waypoint for the first fixed waypoint of the constructed arrival procedure is then searched upstream in the flight plan up to the departure waypoint. The procedure and the flight plan are strung at this point, ignoring any part of the flight plan occurring beyond the identical waypoint. If no matching waypoint is found, the procedure and the flight plan are strung with a discontinuity. When NAV is engaged, stringing of arrivals is not allowed when the destination is the active leg in the F-PLN. If a selected Arrival procedure is laterally (e.g. new waypoint, clear waypoints...) or vertically (e.g. alt constraint, speed constraint,...) revised, and this Arrival procedure is changed, the restringing of Arrival deletes the pilot revisions. A change to any element of the arrival results in the complete restringing of the selected approach from the Nav Data Base. When the missed approach becomes active (and gets displayed in active F-PLN color on ND and MCDU), then the previously flown approach (including missed approach legs) is strung in the flight plan.
(Ref. Fig. 008, 009) If there is an approach transition in the data base which links the active missed approach to the previously flown approach, this transition is strung in the flight plan between the active missed approach and the previously flown approach (but none of the missed approach legs must be deleted to link in the approach transition) (Ref. example 1). If there is no approach transition in the data base which links the active missed approach and the previously flown approach, then a discontinuity is strung between the active missed approach and the previously flown approach (Ref. example 2). For non precision approach, in order to avoid a turn anticipation before the last approach point (MAP or RUNWAY) when the missed approach is strung, an overfly is systematically coded at this point. For pilot comprehension, an overfly symbol at the last approach point is displayed on the MCDU.
Example 1 : Example 2 :
active missed approach active missed approach
approach transition F-PLN DISCON
previously flown approach previously flown approach
missed approach missed approach
end of fight plan end of flight plan
Flight Plan in Approach
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