Pilot Self--Test; Pilot Initiated Self--Test Annunciations; Ground Initialization - Honeywell PRIMUS 1000 Pilot's Manual

PILOT SELF--TEST

After the AHRS is valid, the pilot can manually initiate AHRS test with
the display controller (DC) TEST button. When the AHRS test is
activated, the annunciations in table A--3 are displayed. The following
parameters are also displayed:
5°pitch up attitude
D
45°roll attitude right wing down
D
15°heading.
D
Annunciation
ATT TEST
HDG TEST
HDG TEST

Pilot Initiated Self--Test Annunciations

NOTE: AHRS cannot be tested once airborne.
The system returns the correct values, clears the flags, and
extinguishes the annunciators after the 10--second test sequence is
complete. System modes (e.g., basic or DG) are not affected by the test
sequence.
The test function can extended beyond 10 seconds by continuing to
hold the TEST button. In this case, the test ends when the button is
released. If the test is valid, the TEST annunciation clears at the end
of the test.

GROUND INITIALIZATION

The AHRS system requires approximately 2 minutes to initialize after
the system is turned on. The initialization is complete when the ATT
and HDG flags on the ADI and HSI clear. During the initialization, the
aircraft must be stationary. Wind gusts and aircraft buffeting are not
limiting in this respect. All normal preflight operations, including engine
starts and passenger loading, can be carried out while the AHRS is
initializing. If the initialization requires more than 2 minutes, the AHRS
probably detected excessive aircraft motion. If the aircraft moves
during initialization, the AHRS starts a 5--second alignment process.
The 2--minute cycle can be monitored by watching the HSI heading
A28--1146--112--00
PRIMUSr1000 Integrated Avionics System
I n the PFD attitude sphere
In the PFD heading circle
On the MFD
Table A--3
AHZ--800 Attitude and Heading Reference System (AHRS)
Location
A--9