FLS Guidance Mode and SLS

Question 1

What does FLS stand for?

Answer 1

FMS Landing System

Question 2

What is FLS used instead of?

Answer 2

FINAL APP

Question 3

What does FLS provide, and for which approaches?

Answer 3

Provides cockpit indications and guidance to fly RNP approaches with LNAV/VNAV or LNAV minima, and VOR or NDB approaches

Question 4

How are FLS deviations displayed on the PFD?

Answer 4

Double magenta diamonds, with same scales as ILS deviations

Question 5

What vertical and lateral modes are associated with FLS?

Answer 5

F-G/S and F-LOC

Question 6

How can you tell if your aircraft is FLS capable?

Answer 6

Aircraft config summary

(FLS/FINAL APP Coexistence)

Question 7

How can you tell the approach capability of an FLS approach on the FMA?

Answer 7

Press the LS pushbutton

Question 8

On an FLS approach, when the LS pushbutton is pressed and the FMA reads F-APP, what does this mean?

Answer 8

FLS deviations and F-G/S, F-LOC guidance are reliable

Question 9

On an FLS approach, when the LS pushbutton is pressed and the FMA reads F-APP+RAW, what does this mean?

Answer 9

Crew can refer to FLS deviations but must cross check with navaid raw data (ie VOR, NDB, DME)

Question 10

On an FLS approach, when the LS pushbutton is pressed and the FMA reads RAW ONLY, what does this mean?

Answer 10

Crew must not use FLS and must refer exclusively to navaid raw data

Question 11

During an FLS approach, where can you find if a failure affects the approach capability?

Answer 11

Status page

Question 12

Can you fly RNAV approaches when FLS capability is F-APP+RAW?

Answer 12

No, as no raw data is available for this approach

Question 13

How will the aircraft tell you if there is no FLS available for a given approach?

Answer 13

The message NO FLS FOR THIS APPR will appear on the MCDU scratchpad

Question 14

What is EGNOS?

Answer 14

A group of satellites

Question 15

When can SLS be used on RNP approaches?

Answer 15

When EGNOS is available

Question 16

What minima does EGNOS allow?

Answer 16

EGNOS gives the ability to use LPV minima, however easyJet are restricted to LNAV/VNAV.

We must not use LPV minima

Question 17

What criteria must be met to use SLS?

Answer 17

Config summary states SLS equipped

RNP approach with EGNOS augmentation is available

LNAV/VNAV minima is used (LPV must not be used)

Question 18

How can you identify on the chart if an SLS approach is possible?

Answer 18

In the procedure designator box in the top corner, it will state something like

RNP32L
EGNOS

Also, LPV minima must be shown on the chart, but must not be used

Question 19

If an SLS approach is selected, and you go into FMS RAD NAV page, and then deselect SLS, what would happen?

Answer 19

It would revert guidance to FLS.

SLS must be used when available

Question 20

Is SLS affected by pressure?

Answer 20

No

Question 21

Is SLS affected by temperature?

Answer 21

No

Question 22

Can you carry out a glideslope from above procedure on an SLS approach?

Answer 22

Yes

Question 23

Can you get a false LOC or false glideslope on SLS?

Answer 23

No

Question 24

Can you get interference linked to the ILS protected area on an SLS approach?

Answer 24

No

Question 25

How do you switch between FLS and FINAL APP guidance modes?

Which approach types can you switch between?

Answer 25

FLS/FINAL APP coexistance implies that you can switch between the two on the PERF APPR page (LSK1R).

Possible for VOR/NDB and RNP approaches

Question 26

What are the main benefits of the FLS modification?

Answer 26

Ability to fly curved approaches (RNAV Visual, RNP AR), and straight in RNP AR approaches in FINAL APP

Ability to fly conventional straight in VOR/NDB and RNP approaches using FLS guidance

Question 27

When flying an approach using F-LOC F-G/S guidance, what is the maximum difference between the MCDU and chart vertical path?

Answer 27

0.1 degree is acceptable

Question 28

When flying an approach using F-LOC F-G/S guidance, what data needs to be cross checked against the published approach chart?

Answer 28

The anchor point, the course of the F-LOC and the slope of the F-G/S beam

Question 29

When flying an approach using F-LOC F-G/S guidance, what must be done if the GS beam is out of service?

Answer 29

It must be deselected in the RAD NAV page

Question 30

For FLS, how many FMS must have GPS primary?

Answer 30

At least 1

Question 31

For an FLS approach, when should the APPR push button be pressed?

Answer 31

When the aircraft is cleared for the approach, and when the aircraft is on an intercept trajectory for the final approach course

Question 32

When flying an approach using F-LOC F-G/S guidance, when should PM announce excessive deviation?

Answer 32

F-LOC half dot
F-G/S half dot

Question 33

When flying a VOR/NDB approach using FLS, and FLS capability downgrades to RAW only, what must you do?

Answer 33

Turn off the LS pushbutton and revert to TRK FPA guidance

Question 34

For RNAV(GNSS) approaches with LNAV minima or LNAV/VNAV minima, what should you do if you get F-APP capability lost?

Answer 34

Discontinue the approach unless visual references not sufficient

Question 35

For RNAV(GNSS) approaches with LNAV minima or LNAV/VNAV minima, what should you do if you get NAV FM/GPS POS DISAGREE on ECAM?

Answer 35

Discontinue the approach unless visual references not sufficient

Question 36

For RNAV(GNSS) approaches with LNAV minima or LNAV/VNAV minima, what is the maximum permitted deviation of F-LOC?

Answer 36

1 dot, after which, discontinue the approach unless visual references not sufficient

Question 37

For RNAV(GNSS) approaches with LNAV minima or LNAV/VNAV minima, what is the maximum permitted deviation of F-G/S below the beam?

Answer 37

Half dot, after which, discontinue the approach unless visual references not sufficient

Question 38

Is FLS succeptible to incorrect QNH setting?

Answer 38

Yes

Question 39

What is the issue with RNAV Visual approaches using FLS?

Answer 39

FLS must be manually deselected by crew in the PERF APPR page, as FLS will be default guidance

Question 40

Can FLS be used for curved final approaches? (eg. NCE RNP D 22L/R)

Answer 40

No