Navigation

Question 1

How many ADIRU’s does the US Airways Airbus 319/320/321 have?

Answer 1

Three.

Question 2

When the Mode Selectors are positioned to NAV during a full alignment, what indications should be
noted on the panel?

Answer 2

The ON BAT light illuminates momentarily followed by three align lights on each respective IR.

Question 3

The ON BAT light illuminates momentarily followed by three align lights on each respective IR.

Answer 3

One or more IR’s is being supplied only by the aircraft battery. It illuminates momentarily at the
beginning of a full alignment.

Question 4

If the ADIRS switches are already in NAV, how do you accomplish a rapid alignment?

Answer 4

Select the MODE Selectors OFF then back ON within five seconds and select ALIGN IRS on INIT
page.

Question 5

What would occur if the pilot were to take longer than five seconds to cycle any of the MODE Selectors
from OFF back to NAV?

Answer 5

The affected IRS will initiate a full alignment.

Question 6

Can the present position be entered through the ADIRU panel or must we use the MCDU?

Answer 6

Present position may be entered in the ADIRU through the numeric keyboard.

Question 7

Does the center OFF, 1, 2, 3 switch turn the GNADIRS unit OFF?

Answer 7

No, only the upper display.

Question 8

What would cause an ADIRS ALIGN light to flash?

Answer 8

IR alignment fault, or no present position entry after 10 minutes, or difference between position at
shut down and entered position exceeds 1° of latitude or longitude.

Question 9

The entered position causes the ALIGN lights to flash. If the coordinates are correct, how is the problem
corrected?

Answer 9

Check the city pairs and re-enter if necessary.

Question 10

What would a steady FAULT light in the #1 IR indicate?

Answer 10

The respective IR is lost.

Question 11

Would a fault in the #1 IR cause the #1 ADR to fail?

Answer 11

No, they are independent systems.

Question 12

What would a flashing IR FAULT light indicate?

Answer 12

Attitude and Heading may be recovered in ATT mode.

Question 13

Are we allowed to pushback during the alignment process?

Answer 13

No. Movement will cause the system to fault.

Question 14

After selecting the IR MODE selectors to NAV, when should you select ALIGN IRS on the INIT A page?

Answer 14

Immediately after selecting NAV to avoid excessive ADIRS drift

Question 15

If you were to rotate the #1 IR mode rotary selector to OFF, would that affect the #1 ADR?

Answer 15

Yes, although they are independent systems, they share an ON/OFF switch

Question 16

If IR #1 were to fault in flight, what information would be lost on the #1 PFD? How is it displayed?

Answer 16

Attitude and heading information is lost. Red ATT and HDG flags replace attitude and heading
information on the PFD

Question 17

If IR #1 were to fault in flight, the DDRMI will show a compass card flag. Why?

Answer 17

The DDRMI will show a compass card flag because IR #1 drives the DDRMI compass card until it is
switched.

Question 18

What IR information may be recovered if an IR fault light is flashing?

Answer 18

Attitude and heading may possibly be recovered by turning the rotary IR selector to ATT.

Question 19

Are the IR track, wind, and heading information displayed on the IR overhead panel relative to true or
magnetic?

Answer 19

True

Question 20

If the SYS pb is selected OFF, what is inhibited?

Answer 20

All basic EGPWS alerts (modes 1-5) are inhibited.

Question 21

When is the purpose of the FLAP MODE pb?

Answer 21

To inhibit nuisance warnings when an ECAM calls for landing with a reduced flap setting.

Question 22

What is the purpose of the LDG FLAP 3 pb?

Answer 22

It is used when making a landing in CONFIG 3.

Question 23

If a TERR fault light illuminated, would that affect the basic EGPWS modes?

Answer 23

No.

Question 24

Where is ILS #1 and #2 displayed?

Answer 24

ILS #1 is displayed on the CAPTAIN’S PFD and F/O ND

ILS #2 is displayed one the F/O PFD and the CAPTAIN’S ND.

Question 25

Radio Height displayed on the PFD below what altitude?

Answer 25

Radio Height is displayed on the PFD below 2500’.

Question 26

What information from the ADR is displayed on the PFD?

Answer 26

Airspeed and altitude.

Question 27

When is side stick position and max sidestick deflection, displayed on PFD?

Answer 27

Sidestick position and max sidestick deflection are displayed on the ground on the PFD after the first
engine start.

Question 28

If a RADIO ALTIMETER #1 fails, is radio altitude information lost on either PFD?

Answer 28

No. There are two radio altimeters. Should one fail, the remaining Radio Altimeter height is displayed
on both PFD’S.

Question 29

What information do the FAC’s provide that is indicated on the PFD?

Answer 29

On the PFD, all characteristic speeds are FAC generated: VLS, Vmax, Vfe, ALPHA MAX, ALPHA
PROT, F, and S, speeds, speed trend, etc.

Question 30

With the TERR ON ND pushbutton off, what happens if a terrain caution is generated?

Answer 30

Terrain data is automatically displayed on the ND and the ON light illuminates.

Question 31

How can the pilot differentiate terrain, from radar sweeps?

Answer 31

TERR sweeps from center outward.

Question 32

Does the EGPWS use radar signals to “ground map” terrain?

Answer 32

No, it utilizes a worldwide terrain database.