
PRIMUS
r
1000 Integrated Avionics System
A28--1146--112--00
AHZ--800 Attitude and Heading Reference System (AHRS)
A--6
D
MAG/DG (Magnetic/Directional Gyro) Switch
-- When the pilot
inputs the MAG value, either a flux valve compensated heading, or
DG only heading is displayed.
NOTES:
1. If MAG is selected while in level flight, the AHRS
instantly returns to flux valve slaving. However, if
MAG is selected while in a turn, slaving starts only
after the bank is reduced to a small value and
occurs at 1
_
per minute.
2. While in MAG, no display of flux valve slaving
occurs.
D
CW/CCW (Clockwise/Counterclockwise) Switch
-- When a DG
heading is displayed, the CW/CCW switches let the pilot enter the
desired heading.
EICAS Annunciations
Table A--1 lists AHRS annunciations that are displayed on the EICAS.
Annunciation
Color
Definition
AHRS 1--2 OVHT
Amber
The AHRU is operating outside
normal temperature limits.
Damage can result.
AHRS 1--2 BASIC
MODE
Cyan
AHRS has lost all true airspeed
information from both MADCs. It
is operating in the basic mode.
EICAS AHRS Annunciations
Table A--1