A320 ADIRS Control Display

A320 ADIRS Control Display
by jerome meriweather

Up to OBS Audio ENT
Right to APU Fire Control Panel or Hyd/Fuel
Down to FLT CTL

To View a Control's Description, MouseOver it and ...
Click to "Show" - MouseDown to "Drag" - DoubleClick to "Hide"

Flight Deck Photos and/or Graphic Representation

Data Display Window
Displays the data selected by the DATA Selector. Keyboard entry overrides the display.

Data Selector

Test - Displays all 8s in data display window and illuminates ENT and CLR keys.
TK/GS - Displays true track and groundspeed.
PPOS - Displays present latitude and longitude.
WIND - Displays true Wind direction and speed.
HDG - Displays true Heading and minutes remaining until alignment is completed.
STS - Displays system status message code.

SYS Selector

OFF - Blanks data display window.
1, 3 or 2 - Displays data for associated IRS.

Data Entry Keyboard
Allows entry of preset position or heading in ATT mode, in the selected system.

Alpha Keys - Select N, S, E, W for present position entry or H for heading entry in ATT mode.
Numeric Keys - Key in present position or present magnetic heading in ATT mode, to the data display window.
ENT Key - Illuminates when and alpha key is selected. Enters keyed data into the ADIRS when pushed.
CLR Key - Illuminates when keyed data is of an unreasonable value. Clears keyed (but not yet entered) data from display window when pushed.

ON BAT Light
Illuminates amber when one or more ADIRUs is supplied by airplane battery only. Also illuminates for a few seconds at the beginning of the alignment.

IR Lights 1, 2 & 3

FAULT - Illuminates amber when a Fault affects the associated IR. Flashes if attitude and heading information is recoverable in the ATT mode.
ALIGN - Illuminates white when the associated IR is operating normally in the ALIGN mode.
Flashes if:
- IR alignment fault detected.
- No present position entry has been made after ten minutes.
- Difference between position at shut down and entered position exceeds 1° of latitude or longitude.

IR Mode Selector

OFF - Deactivates associated ADIRU. Both ADR and IR data are not available,
NAV - Provides full inertial data to airplane system.
ATT - Provides only attitude and heading data if loss of navigation capability occurs. Heading must be entered via the ADIRS Control Display Unit and must be reset frequently.

ADR Lights 1, 2 & 3

FAULT - Illuminates amber when a fault is detected in the associated air data reference part.
OFF Switch - Disconnects air data output to associated ADR. IR is not affected.