Flight Director (Fd) Mode Selection; Hdg (Heading) Button; Nav (Navigation) Button; Apr (Approach) Button - Honeywell PRIMUS 1000 Pilot's Manual

Flight Director (FD) Mode Selection

HDG (Heading) Button -- When the HDG button is pushed, the
D
flight director computer is commanded to follow the inputs from the
heading bug on the selected HSI. The command bars on the PFD
are driven to follow the position of the heading bug. While in the
heading mode, a lower bank limit can be selected with the BNK
(Bank) button on the GC.
NAV (Navigation) Button -- Pushing the NAV button directs the
D
flight guidance computer to arm, capture and track the selected
navigation signal sources (VOR, LOC, BC, LNAV, or FMS).
APR (Approach) Button -- Pushing the APR button selects the
D
gains to arm and capture the lateral deviation signal for VOR, LOC,
and BC sources, and selects both lateral and vertical navigation
signals for the ILS to meet approach criteria. Deselection of APR
with LOC source selected removes the vertical navigation signals.
ALT (Altitude) Button -- Pushing the ALT button commands the
D
system to hold the current altitude.
SPD (Airspeed) Button -- When the SPD button is pushed, the pilot
D
can use the SPD knob or touch control steering (TCS) function to
select an airspeed value for the aircraft to hold during a climb or
descent.
Pushing the SPD knob sets the speed reference in knots or Mach.
The value and airspeed bug is displayed on the airspeed tape on the
PFD.
NOTE: The SPD function is inoperative when FLC is selected.
FLC (Flight Level Change) Button -- Pushing the FLC button
D
commands the system to maintain a predetermined airspeed profile
as the aircraft climbs or a predetermined vertical speed profile as the
aircraft descends.
NOTE: The pilot cannot set a speed target, or a vertical airspeed
target with the guidance controller SPD knob when FLC
is selected.
VS (Vertical Speed) Button -- This button selects the system to
D
maintain the current vertical speed and to select and maintain a new
vertical speed using either the SPD knob or by using the TCS button.
The vertical speed target is displayed on the PFD.
A28--1146--112--00
PRIMUSr1000 Integrated Avionics System
Flight Guidance System (FGS)
6-3