ADIRS

Question 1

ON BAT Light - Steady Amber

Answer 1

• Self test during full alignment

- One or more IR are on BAT (External horn sounds)

Question 2

IR 1/2/3 Fault Light - Steady (Amber)

Answer 2

Fault in IR

Question 3

IR 1/2/3 Fault Light - Flashing (Amber)

Answer 3

Attitude and heading may be recovered using ATT Mode

Question 4

IR 1/2/3 Align Light - Steady (White)

Answer 4

Normal during alignment (Appox 10 mins)

Question 5

IR 1/2/3 Align Light - Flashing (White)

Answer 5

• No position entered within 10 minutes
• Bad position (1 degree difference between shutdown and entered)
• Fault

Question 6

IR 1/2/3 Rotary Selector - OFF

Answer 6

ADIRU unpowered

-Wait 10 seconds after switching Off to unpower a/c electrical system

Question 7

IR 1/2/3 Rotary Selector - NAV

Answer 7

Normal mode supplying full inertial data

Question 8

IR 1/2/3 Rotary Selector - ATT

Answer 8

Attitude and heading only supplied

• enter magnetic heading using keyboard
  
  • fourth digit is tenths
  • heading entered will be converted to true heading
• should be entered every 10 minutes

Question 9

ADR 1/2/3 Fault Light - Amber

Answer 9

Fault in Air Data

Question 10

ADR 1/2/3 OFF light - White

Answer 10

No ADR output