ATA 34 - Navigation

Question 1

These messages appear on copilot side ND : ‘ SELECT OFFSIDE RNG/MODE ‘ and “MAP NOT AVAILABLE or MAP PARTLY DISPLAYED”. What is the reason ?

Answer 1

Single FMGC operation and the two EFIS control panels are not set at the same range and the FMGC has delivered an invalid aircraft position

Question 2

When does the ALIGN LIGHT flash ?

Answer 2

During the alignement phase in case of IRS alignement error

Question 3

What does the ADR FAULT light steady illumination on the ADIRS CDU mean ?

Answer 3

A fault is detected in AIR DATA REFERENCE part

Question 4

You press ‘ALIGN IRS’ prompt on INIT A PAGE. on the ADIRS CDU the ALIGN lights flash but no message is displayed on the CDU. What do you do ?

Answer 4

Do make a second ‘ PRESENT POSITION ‘ entry
or
do a quick IRS align

Question 5

In case of failure of both FMGC which navaids are controlled by which RMP ?

Answer 5

RMP 1 = VOR1, ILS1, ADF1
RMP 2 = VOR2, ILS2, (*ADF2)

Question 6

In flight, can you reset an IRS following a manual position up-dating of the FMGC ?

Answer 6

No, impossible during aircraft motion.

Question 7

On the pedestal mounted switching panel the ATT HDG and AIR DATA selectors are AT NORM. Which ADIRU supply which display ?

Answer 7

ADIRU 1 supplies DATA to PFD 1, ND 1 and RMI/VORDME
ADIRU 2 supplies DATA to PFD 2, ND 2

Question 8

ADIRS 3 receives TAT information from which probes ?

Answer 8

CPT TAT probe

Question 9

On ATC CONTROL PANEL the fault light comes on if what ?

Answer 9

Transponder failed

Question 10

When do you have to perform a complete IRS alignment ?

Answer 10

• Before the first flight of the day, or when there is a crew change
• When the GPS is not available and the expected flight time is more than 3 h.
• When the GPS is not available and the NAVAID coverage is poor on the expected route

Question 11

You can perform IRS alignment while engines are running. True or False ?

Answer 11

False

Question 12

When do you perform a fast IRS alignment ?

Answer 12

When IRS and FMGS position difference is above 5 Nm.

Question 13

How many ILS, VOR, DME and ADF you can tune ?

Answer 13

2 ILS, 2 VOR, 2 DME and 1 ADF (or 2 if equipped)

Question 14

On what display ILS 1 is set ?

Answer 14

PFD 1 and ND 2

Question 15

When an IR FAULT flash, what does it mean ?

Answer 15

Partial failure of the IR, you can recover HDG and ATT information by switching pb

Question 16

What does mean an IR FAULT steady light ?

Answer 16

IR completely lost