*Navigation Surveillance - ADIRS Panel Flashcards
*When is a full alignment of the ADIRU required?
4
-First flight of the day.
-Crew change.
-GPS unavailable and NAVAID coverage is poor or flight longer than 3 hrs.
-In class II Navigation.
When is a quick alignment acceptable?
When aircraft is in transit (full alignment not required).
When deviation of the IRS position from the FMGC position is at or above 5 NM.
When you turn the mode selector to NAV, what are you looking for on the panel?
The ALIGN light illuminates steady.
*What does the ON BAT light indicate?
It is illuminated amber if one or more IRs is supplied by the aircraft battery. Also, illuminates briefly during the beginning of a full alignment.
*What does a steady white ALIGN light indicate (older panel with keypad)?
The respective IR is Align mode.
What does it mean when the IR lights are extinguished?
Alignment is completed.
*What does a flashing white ALIGN light mean?
-Incorrect position
-No present position entered
-A/C moved during alignment
*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 lost the navigation portion).
*What does the steady amber ADR FAULT light indicate?
A fault is detected in the Air Data Reference part.
*Does turning the IR to OFF also turn off the ADR?
Yes
*Can you turn the ADR OFF and still have the IR?
Yes
With the loss of ADR 1, what would be lost on the Captains PFD?
Airspeed and Altitude Information
(outside info)
*What would restore the loss of altitude and airspeed information on the Captains PFD, if ADR 1 failed or was turned off?
Selecting CAPT 3, on the EIS Switching Panel, AIR DATA Selector.
*What would be missing on the Captain’s PFD if IR 1 failed or was turned OFF?
Attitude and Navigation information. (Inside info). ATT and HDG flags will be displayed on the PFD AND MAP NOT AVAIL will be on the ND.
*What action would recover the attitude and navigation information on the Captain’s PFD, if IR1 failed or was turned off?
Selecting CAPT 3 on the EIS switching panel ATT/HDG selector.
*How long will each ADIRU stay on battery power?
ADIRS 2 and 3 will remain on battery power for 5 mins 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 battery #2 fails.
*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-Bearing altitude
O-Overspeed Warning
A-AOA
T-Temperature
S-Speed/Mach
*How does the ADIRS panel indicate that an IR is in ALIGN mode?
Before any engine start (on E/WD)
- IR IN ALIGN X MN memo appears in green when at least one active IRS is being aligned.
When one engine is started (on E/WD)
-IR IN ALIGN X MN memo appears in amber during IRS alignment
-IR NOT ALIGNED is displayed as an ECAM Caution Message if the alignment of one IRS is faulty.
-IR IN ATT ALIGN appears in green during IR alignment in Attitude Mode
*How is the crew alerted to the FMGS having no current position, an incorrect position or if the aircraft has moved during alignment?
IR IN ALIGN X MN memo pulses in green on the E/WD
*How do you FAST ALIGN an IR?
Select each ADIRS selector to OFF and then back to NAV, one at a time, within 5 sec
*What does the IR pushbutton do on the newer AIDIRS panel?
Inertial data output of the respective IR is disconnected
*What is the process for full ADIRS alignment when the flaps are not retracted?
-Do not set all ADIRS to off at the same time.
-Set a single IR mode to OFF for more than 5 secs, then set it to NAV. Repeat for the other IRs.
