2. System Description
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 A. Flight Plan Elements The definition of a flight plan consists in declaring both lateral and vertical elements. The lateral elements are defined by the waypoints and the legs between the waypoints (Ref. para. (1)). The vertical elements are mainly defined by the constraints (altitude, speed, time, Flight Path Angle (FPA) at the waypoint, the various limits and predictions along the F-PLN (Ref. para. (2)). The pilot may view these elements of the flight plan in the sequence in which they occur on the flight plan page. (Ref. Fig. 001) The description of the fields is :
 -Lines 1L through 5L : waypoints and legs are displayed along the left side of the page. The label line contains the path defining the leg (airway, SID, STAR). Adjacent to the leg is displayed the bearing (between FROM waypoint and TO waypoint) or the track (between waypoints in lines 2 and 3). Adjacent to the bearing or track is displayed in nautical miles the distance between two successive waypoints (leg length generally). Adjacent to the distance the FPA may be displayed if an entered terminal area procedure defines the FPA to be flown. The data line contains the termination of the leg. The data in this line may be in parentheses, indicating that the waypoint is a pseudo waypoint. Adjacent to the waypoint is displayed the predicted time at which the aircraft passes the waypoint. On ground this is the elapsed time to the waypoint and in flight, it indicates the predicted time (UTC) at the waypoint. Adjacent to the time are displayed the speed at which the aircraft passes the waypoint in CAS or MACH, and the calculated altitude while crossing the waypoint. It may be an altitude or a flight level.
 -6L : On this line following information is displayed :
 -airport or runway ident
 -estimated time of arrival
 -distance to go to destination along the flight plan
 -estimated fuel on board at destination.
 (1) Lateral flight plan elements
 (a) Definitions
 1_ Lateral defining legs
 (Ref. Fig. 002, 003, 004, 005)
 The lateral defining legs that may appear on the MCDU are
 contained in the following tables. 

 ACTIVE F-PLN A Page in Cruise with an Offset
 Figure 001

 Path and Terminator (Sheet 1/4)
 Figure 002

 Path and Terminator (Sheet 2/4)
 Figure 003

 Path and Terminator (Sheet 3/4)
 Figure 004

 Path and Terminator (Sheet 4/4)
 Figure 005

 The following table describes the way the legs are coded on
 the flight plan pages.
 FC and FD legs are coded in navigation data base but they are
 computed as CF legs for system calculations.

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|MCDU DISPLAY| PATH/ | COMMENTS |ACCESS TO|ACCESS TO| | |TERMINATOR | |LAT REV |VERT REV | |------------|-----------|-----------------------------|---------|---------| |WPT (1) | DF |The label line is blank for | YES | YES | | | TF |TF and DF legs that result | | | | | IF |from pilot entry or DIRTO. It| | | | | |is always blank for IF. | | | |------------|-----------|-----------------------------|---------|---------| |VIA | TF |If defined as part of a | YES | YES | |WPT | DF |terminal area procedure or | | | | | |airway, the VIA name is | | | | | |displayed. | | | |------------|-----------|-----------------------------|---------|---------| |CXXX. (1) | CF |XXX is the defined course. | YES | YES | |WPT | | | | | |------------|-----------|-----------------------------|---------|---------| |DD NAV | AF |DD is the distance of the | YES | YES | |WPT | |arc. NAV is the navaid the | | | | | |arc is defined from. WPT is | | | | | |the terminating waypoint. | | | |------------|-----------|-----------------------------|---------|---------| |HOLD L (3) | HA |L is direction of bank | YES | YES | |HHHHH | |(L-left, R-right) HHHHH -| | | | | |terminating altitude | | | |------------|-----------|-----------------------------|---------|---------| |HOLD L (1) | |XXX is the inbound course to | YES | YES | |CXXX. | HM |the holding pattern fix. L is| (4)| (2)| |WPT | |direction of bank (L-left, | | | | | |R-right). WPT is the holding | | | | | |pattern fix which may be a | | | | | |fixed waypoint or T-P. | | | |------------|-----------|-----------------------------|---------|---------| |HOLD L | HF |L is direction of bank | YES | YES | |WPT | |(L-left, R-right). | | | |------------|-----------|-----------------------------|---------|---------| |PROC T | PF |A PF replaces a PI-CF | YES | YES | |WPT | |combination. The termination | | | | | |of the PF leg is the fix of | | | | | |the original CF. | | | |------------|-----------|-----------------------------|---------|---------| |HXXX. (3) | VA |XXX is heading | YES | YES | |HHHHH | |HHHHH - terminating altitude | | | |------------|-----------|-----------------------------|---------|---------| |HXXX. | VD |XXX is heading / NAV is DME | YES | YES | |NAV/DD | |station / DD is DME distance | | | |------------|-----------|-----------------------------|---------|---------|
　
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