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Flight Management System (FMS) for the Agusta AW139/AB139 Helicopter
— ANGLE -- A descent vertical path is displayed when the FMS can
fly a vertical path to a waypoint. An altitude constraint for the
waypoint is required for the FMS to be able to fly a vertical
descent path. The vertical angle is calculated based on current
conditions and performance initialization. FMS computed
vertical descent angles are displayed in small font, while pilot
entered angles are displayed in large font.
— VERTICAL SPEED -- The FMS predicted vertical speed is
displayed unless a higher priority item is displayed. Pilot--entry
of vertical speed is not permitted.
When vertical angle and airspeed constraints are entered,
airspeed is shown above the angle and is also a constraint.
Additions and Deletions to the Flight Plan -- Several actions that
D
result in adding and/or deleting waypoints are in the flight plan. Any
entry permitted at the VIA.TO prompt can also be made into
previously entered waypoints. The rules that apply are described as
follows:
— Single waypoints, including temporary waypoints, are permitted
to be added to or deleted from the flight plan. To add a waypoint
to the flight plan, the waypoint is line selected from the
scratchpad to the appropriate line. The added waypoint is
displayed on the line selected. When adding a waypoint, the
flight plan is searched forward of the point of insertion. When the
waypoint is in the flight plan, all the waypoints between the point
of insertion and the first appearance of the added waypoint are
deleted. When the waypoint is not forward of the inserted point,
the flight plan is opened and the new waypoint inserted.
Searching forward in the flight plan is restricted to the portion of
the flight plan being modified (that is, either the primary flight plan
or the alternate flight plan).
— Waypoints are deleted using the DEL key. After entering
*DELETE* in the scratchpad, line selecting a waypoint deletes
the waypoint. When the waypoint is deleted, the flight plan is
closed and linked together. Waypoints are deleted by entering a
waypoint forward of the point of entry in the flight plan.
The pilot can delete both TO and FROM waypoints in some
combinations of flight plan changes. When this occurs, a
CHANGE ACT LEG prompt is displayed, as shown in
Figure 7--10.
Flight Plan
7-18
Honeywell International Inc. Do not copy without express permission of Honeywell.
A28- - 1146- - 181
REV 3 Mar 2009
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