ADIRS

Question 1

What are the IR functions?

Answer 1

Attitude, heading, flight path vector, track, accelerations, angular rate, ground speed and aircraft position.

Question 2

(Air Data Inertial Reference System).
Each ADIRU is divided into two parts: ADR+IR.

What are the ADR functions?

Answer 2

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

Question 3

“ON BAT” Illuminates amber when?

Answer 3

When one or more IR’s supplied only by battery.

or comes on as a test for a full alignment.

Question 4

A Full Alignment is “turned off” for how long?

Answer 4

> 5 seconds and could take 10 mins.

Question 5

IR 1 (2) (3) FAULT/ALIGN:

What is a Steady fault?

Answer 5

The respective IR is lost.

Question 6

IR 1 (2) (3) FAULT/ALIGN:

What does a flashing “FAULT” represent?

Answer 6

The attitude and heading information may be recovered in ATT mode.

Question 7

IR 1(3)(2) FAULT / ALIGN has a steady align when normal.

What does a flashing align mean?

Answer 7

10.01 FM

10 minutes; No position entry
01°; > 1° diff in entered lat long.
Fault; alignment
Movement; aircraft

Question 8

IR rotary selectors have 3 selections:
OFF, NAV, ATT. What is ATT mode?

Answer 8

ATT: only attitude and heading information from IR.

Question 9

What does FAULT and OFF represent on the bottom 3 ADR Pbs?

Answer 9

FAULT is a fault

OFF: Air data ref disconnected. IR remains powered

Question 10

What do the ELAC + SEC comps. control?

Answer 10

ELAC- elevator, aileron, horizontal stab.
SEC- Spoiler, elevator, Horizontal stab.

Question 11

What does the FAC control?

Answer 11

F.L.E.W.

Flight envelope
Low energy warning
Electrical rudder control
Wind-shear detection