Honeywell SPZ-8000 - Heading Select Mode

SPZ--8000 Digital Integrated Flight Control System
A28--1146--055
REV 2
8-3
Modes of Operation
HEADING SELECT MODE
The heading select mode is used to intercept and maintain a magnetic
heading. The mode is engaged by pushing the HDG button on the flight
guidance controller. HDG is annunciated on the EADI. Engaging the
heading select mode resets all previously selected lateral modes.
The pilot uses the HDG knob on the instrument remote controller to
move the heading bug to the desired heading on the EHSI. The heading
select signal is sent from the instrument remote controller to the symbol
generator. The symbol generator compares the desired aircraft
heading to the actual aircraft heading and sends the resulting heading
error signal to the flight guidance computer .
The flight guidance computer generates the proper roll command to
bank the aircraft to intercept and maintain the pilot selected heading.
The heading select mode is cancelled by:
D Pushing the HDG button on the flight guidance controller
D Selecting go--around mode
D Selecting standby mode
D Automatic capture of any other lateral steering mode
D Coupling to the cross--side EHSI
D With the autopilot engaged, moving the turn knob out of detent.