Is there a default frequency for ILS? (Airbus tuned to wrong ILS during ILS and RNAV approach to FACT rwy 01)

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41

a little freeware that has always helped for my ILS flights or other a great source of information

42

This is actually not entirely true for the A320neo. When you select an ILS approach on the ARRIVAL page it will populate the ILS frequency on the RAD NAV page.

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43

This person is incorrect.

OP, when you create your flight plan in the main menu before loading your flight, if you don’t select an approach and runway for arrival, the aircraft will not have any approach information or ILS frequencies loaded into the FMS when you start the flight.

However, if you do select an approach and runway in the main menu for arrival, then the FMS will have this all pre-loaded by the sim when you start the flight.

The issue you’re experiencing that you described in your original post, is a bug. In fact, loading SID’s and STAR’s in the FMS generally is very buggy.

The developers are aware and are trying to implement a fix.

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44

This person is correct. :slight_smile:

46

Please be polite to each other and enjoy yourselves, everyone. This is a forum for people playing a game. :slight_smile:

47

I thought the LS switch was just an overlay and only displayed lateral and vertical guidance.
I use it for RNAV approaches.

48

Hi Vibstronium,

I had the same issue yesterday; i already created a post this morning asking exactly the same question.

I deleted the post right now after finding yours; so here’s my original question:

Hi everyone,

Yesterday something a bit strange happened to while flying into Manchester EGCC.
There are 2 runways: ILS 23R and RNAV 23L

So my original flight plan was set to land at 23R on the ILS; but the controller asked me to land on 23L.

I changed the details in the MCDU F-PLN; however when i checked the RAD/NAV, the 23R ILS frequency was still tuned in. I did not bother about that since 23L would be using RNAV GPS.

On the approach (APPR), the aircraft was tracking 23R and on the ND, ILS 23R was shown ! on the PFD, there were no lateral nor vertical diamonds, but only the vertical square (for RNAV).
I cleared the radio frequency and the aircraft changed course to the 23L runway !

My questions are:

  • When changing runways and approach types, doesn’t the RAD/ NAV option need to follow?
  • is it imperative that you clear the RAD/ NAV ILS frequency for the system not to get confused?

Thanks for your feedback

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49

I did and also experienced different autopilot behaviours when having a flight plan created before loading the flight and one created when inside the cockpit.

i am now keeping a sharp eye on all waypoints and only do short flights now. :expressionless:

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50

Quote: “When cleared for the RNAV approach press the APPR pb on FCU. Do NOT select the LS pb! LS pb will disable the RNAV indications and flash amber V/DEV on the PFD.”

Source: RNAV Approaches (airbusdriver.net)

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51

Do you check your flightplan with the PLAN mode of the EFIS mode selector before taking off (or the VFR map alternatively) for any oddities?

52

Hi Judge,

It was quite an interesting read; while i watched a couple of RNAV tutorials before, I did not pay attention to the LS key select !
indeed, easyjetsimpilot tells you not to select the LS key. But if you do that in the sim, apparently the display on the PFD is erroneous - so right now might be difficult to track the vertical guidance.

Thanks again.

53

Yes, everything showed fine. the original plan was for the ILS 23R; the frequency was entered correctly.

It is only in flight when i made the changes and then pushed the LS key that maybe things got messed up.

It was a good learning step though.

54

This is correct.

55

I don’t know if this is how it’s supposed to work. From what I know RNAV approaches should be the type where you would actually calculate your descent on final approach and / or use techniques like CDFA.

I had many occasions where the autopilot would have a decent glide path on approaches like that. I’m not sure if this would be expected behavior in the real world aircraft but it helps a lot at times.

Approach charts are usually a good source for final approach guidance.
I use this tool to calculate descent rates: Precision Descent Profile Online Calculator (aerotexas.com)

Continuous Descent Final Approach (CDFA) - SKYbrary Aviation Safety

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56

Thanks Judge, really appreciate the help.

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57

You’re welcome. I’m personally far from being an expert on the topic. I’m just trying to share what I’ve figured out so far. Which might not be correct or optimal from an expert’s point of view, though.

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