ADIRS PANEL Flashcards
When you turn the mode selectors to NAV for a full alignment, what are you looking for on the panel?
Ensure that each ADIRU has the ability to revert to the batteries by observing the BAT light illuminating for several seconds.
What does the ON BAT light indicate?
It is illuminated amber if one or more IR(s) is supplied by the aircraft battery. Also illuminates briefly during the beginning of a full alignment.
How long will each ADIRU stay on battery power?
ADIRS 2 and 3 will remain on battery power for 5 minutes to hold alignment until a generator can be restored. ADIRU 1 (ADIRU 3 if captain selected ATT HDG CAPT 3) will remain on battery power until generator power is restored or the batteries fail.
What information is provided by the “IR” units (FAT HAAG)?
F - Flight path vector A - Airplane position T - Track H - Heading A - Attitude A - Acceleration G - Ground Speed
What information is provided by the “ADR” units (BOATS)?
B - Barometric altitude O - Overspeed warnings A - AOA T - Temperatures S - Speed/Mach
What does a steady white ALIGN light indicate?
The respective IR is in the Align mode
What does a flashing white align light mean?
There are three reasons that the white align lights will flash, there is no current position, the position is incorrect or the aircraft moved during alignment.
How do you fast align an IR?
Turn the IR mode selectors OFF momentarily (not more than 5 seconds) and then back on.
What does steady illumination of the amber IR FAULT light indicate?
A fault affects the respective IR.
What does flashing illumination of the amber IR FAULT light indicate?
Attitude and Heading may be recovered in ATT mode (you have lost the navigation portion).
What does the amber ADR FAULT light indicate?
A fault is detected in the Air Data Reference portion
Does turning the IR to OFF also turn off the ADR?
Yes
Can you turn the ADR OFF and still have the IR?
Yes
When is a full alignment required/quick alignment of the ADIRU required?
a. Before the first flight of the day, or
b. When there is a crew change (EXCEPTION only when Flaps 1 and temp above 30C), or
c. When the GPS is not available and the NAVAIDS coverage is poor on the expected route, or
d. When the GPS is not available and the expected flight time is more the 3 hours
e. When any portion of the flight is conducted in Class II Navigation
Describe the process for a full alignment of the ADIRU when the temperature is above 30 C.
a. Confirm the aircraft area is clear with ground personnel prior to pressurizing the hydraulic system
b. Once the area is clear, turn the Y ELEC Pump ON
c. Raise the flaps to 0
d. Turn the Y ELEC Pump OFF
e. Perform the complete ADIRS alignment
f. Confirm the aircraft area is clear with ground personnel prior to pressurizing the hydraulic system
g. Once the area is clear, turn the Y ELEC Pump ON
h. Return the flaps to 1 if still in hot weather conditions
i. Turn the Y ELEC Pump OFF
