ADIRS Panel

Question 1

When is a full ADIRS alignment required?

Answer 1

• before the first flight of the day, or
• when there is a crew change, or
• when the gps is not available and the NAVAIDS coverage is poor on the expected route, or
• when the gps is not available and the expected flight time is more than 3 hours.
• when flight is expected to be conducted in class II navigation

Question 2

When is a quick alignment of ADIRS acceptable?

Answer 2

A fast IRS alignment must be performed 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)

Question 3

How is a ADIRS quick align performed?

Answer 3

• Turn each IR selector OFF and back ON (must occur within 5 sec for each IR)
• align on REF

Question 4

When you turn the mode selectors to NAV, what are you looking for on the panel?

Answer 4

The ALIGN light illuminates steady

Question 5

What does the ON BAT light indicate?

Answer 5

It is illuminated amber if one or more IR(s) is supplied by the aircraft battery. Also illuminates briefly during the beginning on a full alignment

Question 6

What does the steady white ALIGN light indicate?

Answer 6

The respective IR is in the align mode

Question 7

What does it mean when the IR lights are extinguished?

Answer 7

Alignment has been completed

Question 8

What does a flashing white align light mean?

Answer 8

• IR alignment fault (aircraft moved during alignment)
• No present position entered within 10 min of NAV selection
• Difference of 1 degree LAT/LONG between shutdown and entered position

Question 9

What does a steady illumination of the amber IRU FAULT light indicate?

Answer 9

A fault affects the respective IR

Question 10

What does a flashing illumination of the amber IRU FAULT light indicate?

Answer 10

Attitude and heading may be recovered in ATT mode (you’ve lost the navigation portion)

Question 11

What does the amber ADR FAULT light indicate?

Answer 11

A fault is detected in the air data reference part

Question 12

Does turning the IR to OFF also turn off the ADR?

Answer 12

Yes

Question 13

Can you turn the ADR off and still have the IR?

Answer 13

Yes

Question 14

With the loss of ADR 1, what would be lost on the captains PFD?

Answer 14

Airspeed and altitude info (outside info)

Question 15

What would restore the lost altitude and airspeed information?

Answer 15

Selecting CAPT 3 on the EIS switching panel air data selector

Question 16

What would be missing on the captains PFD if IR 1 failed or was turned off?

Answer 16

Attitude and navigation information (inside info)

Question 17

What action would recover the attitude and navigation information?

Answer 17

Selecting CAPT 3 on the EIS switching panel ATT/HDG selector