Navigation / FMC

Question 0

Which pitot static system provides info to the ISFD?

Answer 0

Centre

Question 1

What is the maximum distance you can pass by a waypoint for the for the active waypoint to move to the next in sequence?

Answer 1

21 NM

Further than this and the ‘old’ active waypoint remains.

Question 2

The 2 GPS receivers send their information where?

Answer 2

To their corresponding IRSs. These then feed the FMC. If the IRSs are inoperative then the GPSs feed the FMC direct.

Question 3

What are the primary sources for attitude on the primary flight displays?

Answer 3

AHRU L IRU L

AHRU R IRU R

Question 4

Is the ADF tuned automatically?

Answer 4

No

Question 5

Can the IRS be re-aligned in flight?

Answer 5

Yes. In level unaccelerated flight.

Question 6

What does a horn in the nose wheel well mean when on the ground?

Answer 6

An IRS is on, and running on battery power. ( hot battery bus)

Question 7

How long must the IRSs be switched off for to realign?

Answer 7

30 Seconds

Question 8

How do you manually enter an ILS or GLS?

Answer 8

ILS freq/course. Ie 111.7/245

GLS just the channel. Ie 20661

Question 9

What are the approach tuning inhibits?

Answer 9

After LOC or GS capture with autopilot

Below 500ft without autopilot

Question 10

How can you remove tuning inhibits?

Answer 10

TOGA switch
A/P off, FDs off
APP switch off above 1500ft RA

Question 11

If an IRS cannot provide attitude to the PFD, what provides data?

Answer 11

ISFD . Message SGL SOURCE ATTITUDE will be displayed.

Question 12

VSD is in route mode when ______ is engaged.

Answer 12

LNAV

Question 13

If in HDG, the VSD is in what mode?

Answer 13

Track mode. Track mode is also used if deviation is more than the RNP.

Question 14

What is the VSD corridor width?

Answer 14

2 times RNP value. Max width 10 miles

Question 15

What is the maximum range that terrain can be shown on the map and VSD?

Answer 15

320 nm

Question 16

During take off roll you can disarm LNAV & VNAV by pushing?

Answer 16

TOGA switch above 80 Kts

Question 17

A TOGA switch on take off will remove a _______?

Answer 17

Thrust debate

Question 18

If ALT CAP occurs in a TOGA pitch climb what do the FMAs show?

Answer 18

SPD TOGA ALT

Speed will increase to the current flap limit speed -5kts or 250kts if flaps up. Press CLB/CON to set climb thrust.

Question 19

What is the difference between the LOC GS indicators and the IAN approach indicators on the PFD?

Answer 19

ILS are diamond shape

IAN are triangles (as are NPS)

Question 20

Can you use an IAN approach with QFE?

Answer 20

No it must be QNH

Question 21

When do ILSs and IAN ‘tune’?

Answer 21

Less than 50 nm from T/D
or less than 150 nm from massed approach point
or FMC descent phase

Question 22

On a IAN approach, when do you arm the APP Mode?

Answer 22

Cleared for the approach
On intercept heading
Deviation pointers in view

Question 23

How does a IAN excess deviation show?

Answer 23

The scale changes to Amber if the pointer is over the ANP bar for 5 seconds or more.

Question 24

On a back course approach, what course will you see on the NAVRAD page and the PFD?

Answer 24

The front course. Do not change this!