ADIRS PANEL-even

Question 1

What is the ADIRS?

Answer 1

Air Data and Inertial Reference System

Question 2

What type of information does the Air Data Reference System provide?

Answer 2

Barometric altitude, airspeed, over speed warnings, temperature, angle of attack, mach.

Question 3

What type of information does the IR provide?

Answer 3

Attitude, Flight Path Vector (FPV), track, heading, acceleration, angular rates, groundspeed and aircraft position.

Question 4

If there was an IR1 FAULT, what should be done with the switching panel to display backup data appropriately?

Answer 4

ATT/HDG to Capt 3

Question 5

If there was an ADR1 FAULT, what should be done with the switching panel to display backup data appropriately?

Answer 5

AIR DATA to Capt 3

Question 6

Explain the ADIRS Power-up and Initialization

Answer 6

• Switch from OFF to NAV
• ON BAT light illuminates and then extinguishes
• The E/WD memo section displays “IRS IN ALIGN” during alignment

Question 7

What are some indications of an ADIR having reverted to battery power on the ground?

Answer 7

• An external horn sounds
• The ON BAT light comes on
• An ADIRU & AVNCS light illuminates in amber on the external power panel.

Question 8

What is the significance of a steady FAULT light on the IR?

Answer 8

IR has failed and cannot be recovered

Question 9

What is the significance of a flashing FAULT light on the IR?

Answer 9

Navigation function is lost. Attitude and Heading may be recovered in ATT mode.

Question 10

Describe what would happen if an ADR was selected OFF?

Answer 10

• The pilot would lose barometric altitude, airspeed, Mach, angle of attack, temperature and over speed warnings from that one ADR.
• The ECAM would instruct the pilot to select the AIR DATA SWTG to CAPT 3 or F/O 3 as appropriate.
• At that point the affected pilot’s side would return to normal.

Question 11

What functions are lost when an IR is turned OFF?

Answer 11

• Only the IR information
would be lost and the ADR information will still be available.

Question 12

When would a pilot perform a complete alignment versus a fast alignment?

Answer 12

Complete Alignment:
• Before the first flight of the day, or
• When there is a crew change, or
• When the departure airport is located between latitudes 2o north and 2o
south, or
• If GPS is not available and NAVAID coverage is poor on the expected
route, or
• If GPS is not available and the expected flight time is more than 3 hours
Fast Alignment:
• If a complete IRS alignment is not necessary and the difference between
the IRS position and the FMGC position is at or above 5NM (see MCDU
POSITION MONITOR page).