PointyTail

Autolandings cant execute

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I have noticed that for approaches to some CAT III equipped runways, such as 7R at Fairbanks, I can't seem to enable both AP to facilitate a CAT III landing. Enabling the second AP simply makes the other AP disable itself. This happens both with just a localizer lock, and also with both localizer and GS captured. Otherwise, the plane is fully configured for landing. What would cause this?

Joe N

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I discovered in my case that this was a result of using a startup panel from a previous version. Try creating a new one if you are using a custom startup panel state. Worked for me. I couldn’t enable auto land on any runway with my old panel state. Took a while to figure that one out, lol.

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Hi,

Just in case, both nav receivers set to the ILS frequency and course?

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14 hours ago, Budbud said:

Hi,

Just in case, both nav receivers set to the ILS frequency and course?

Yes. And gear down, flaps set, spoilers armed, autobrake set, and reference speed set. One odd thing though. The runway is supposed to be 72 degrees and is shown as such in the FMS and in the Navigraph approach plate. I set this as the MCP course. But the dial actually changes to 69 degrees when I capture the localizer, and I cannot change it. 

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9 minutes ago, PointyTail said:

The runway is supposed to be 72 degrees and is shown as such in the FMS and in the Navigraph approach plate. I set this as the MCP course. But the dial actually changes to 69 degrees when I capture the localizer, and I cannot change it.

There is an option in the PMDG settings so that the course is automatically set to the course in the sim. If the magnetic variation differs in the sim from the reality, you will get a different course for the ILS than the current one on the charts. To avoid misalignment due to that difference, the PMDG retrieves the value from the sim and set it for you.
You can however disable that option.

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MOD: Thread title edited.

Autoland is technically an independent function on ILS category. Provided you gave it the proper data, you could do it from an RNAV approach, too, in theory. The inclusion of CAT III is somewhat of a simism.

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14 hours ago, scandinavian13 said:

MOD: Thread title edited.

Autoland is technically an independent function on ILS category. Provided you gave it the proper data, you could do it from an RNAV approach, too, in theory. The inclusion of CAT III is somewhat of a simism.

Can you do a CAT III from RNAV in this sim?

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1 hour ago, PointyTail said:

Can you do a CAT III from RNAV in this sim?

Sure.   Almost all of my approaches are RNAV to the LOC or RNAV.  I much prefer RNAV, it's much smoother.  

I know of several airlines that do not do coupled CAT III approaches, all HUD.  You can do stuff with RNAV and the HUD that can not be done with just a coupled RNAV or ILS.

blaustern

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I was having problems using auto land my self and discovered the one big important factor is you have to capture the glide slope before the auto land will work

what you have to do is after setting up the auto land center with the runway length and altitude you have to make sure that the ILS frequency is set on both Nav1 and Nav2 then once you get the signal activate VOR lock once you are locked on the localizer you arm the approach and the engage the second auto pilot than just sit back and watch

do not forget to arm the spoilers.

I made my first auto land at KDEN the other day.

 

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Are you sure that you are landing Fairbanks?  PAFA is 2R/2L - 20R// 20L.  Anchorage, PANC, is 7R/7L - 25R/25L. 

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I had this issue today as well. I will of course try a new panel state and see if that solves it as I was using an old panel state.

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The auto land sequence will not work unless you first capture the glide slope

If after pressing the second autopilot button the first button goes blank than you have not captured the glide slope

 

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26 minutes ago, Gary M Buska said:

The auto land sequence will not work unless you first capture the glide slope

If after pressing the second autopilot button the first button goes blank than you have not captured the glide slope

 

Yeah that was my issue actually, I tried it today and let the plane capture the GS before hitting APP and then both AP’s worked. Thanks 

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No problem I know it drove me crazy trying to figure it out.  I could not get the second autopilot to arm no matter what I did. I must have watched several videos on how to do this before I finally figured it out.

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13 minutes ago, Gary M Buska said:

No problem I know it drove me crazy trying to figure it out.  I could not get the second autopilot to arm no matter what I did. I must have watched several videos on how to do this before I finally figured it out.

Yes same with me it was bothering me that it was making me cranky hahah

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This may not be as big an issue as I thought. I am having trouble reproducing the CAT III failures. So that's good!

On a related note: in testing this, I have discovered that there is no CAT III for KMIA, nor for any airport in Hawaii. I find this very surprising, given the kinds of weather they experience.

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5 hours ago, PointyTail said:

I find this very surprising, given the kinds of weather they experience.

I've never flown into Miami with weather less than ILS CAT I mins. There may be a rare day, but to be honest, you pay for that type of equipage and monitoring. If it isn't high-frequency, it's not worth the expense. BOS? ORD? DEN? SEA? Sure. MIA? I can't tell you the last time I saw low ceilings/vis meriting CAT III there.

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On 1/16/2018 at 1:35 PM, Gary M Buska said:

I was having problems using auto land my self and discovered the one big important factor is you have to capture the glide slope before the auto land will work

what you have to do is after setting up the auto land center with the runway length and altitude you have to make sure that the ILS frequency is set on both Nav1 and Nav2 then once you get the signal activate VOR lock once you are locked on the localizer you arm the approach and the engage the second auto pilot than just sit back and watch

do not forget to arm the spoilers.

I made my first auto land at KDEN the other day.

 

 

19 hours ago, Gary M Buska said:

The auto land sequence will not work unless you first capture the glide slope

If after pressing the second autopilot button the first button goes blank than you have not captured the glide slope

 

 

19 hours ago, aushie said:

Yeah that was my issue actually, I tried it today and let the plane capture the GS before hitting APP and then both AP’s worked. Thanks 

 

This is what I term a "Sim-ism." You don't need to capture the LOC before you arm APP. And you can't capture the G/S unless you're in APP mode.

Here's how you do it:

Get your intercept heading,

Verify you have LOC and G/S indications on the PFD (not the FMA, the needles),

Identify the station (eg ICJL) on the PFD,

Arm APP,

Select the 2nd A/P.

 

Reversing the order of the last two items is what gets most people.

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7 hours ago, PointyTail said:

This may not be as big an issue as I thought. I am having trouble reproducing the CAT III failures. So that's good!

On a related note: in testing this, I have discovered that there is no CAT III for KMIA, nor for any airport in Hawaii. I find this very surprising, given the kinds of weather they experience.

First things first

Not every airport has a CAT 2 or 3 approach

second the aircraft has to be certified as CAT 2/3 as well

third the pilots have to be certified also

And you are correct KMIA does not have a CAT 2/3 runway so if the weather does get that bad than you will not be able to use CAT 2/3 Approach and the airport may even close

Oh by the way there is one other factor that can create problems when landing and that is RVR (RUNWAY VISUAL RANGE) Every aircraft is rated and if the RVR drops below that point you will not be able to land.

I used to work at KJAX(JACKSONVILLE INTERNATIONAL) and was contracted to Delta and we had two MD88's that have a very low RVR so when the fog started rolling in these aircraft had to divert to another airport.

We had a B767-300 that landed okay but than we had to go and tow him to the gates as he could not see the taxi ways the fog was pretty thick. The RVR was down to less than 25 ft. Both MD88,s had to go to KATL and than ferry back to Kjax in the morning. which made our night a little easier

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16 minutes ago, Gary M Buska said:

We had a B767-300 that landed okay but than we had to go and tow him to the gates as he could not see the taxi ways the fog was pretty thick. The RVR was down to less than 25 ft. Both MD88,s had to go to KATL and than ferry back to Kjax in the morning. which made our night a little easier

This reminds me of one of my favorite fog stories so please bear with me.  Control tower at Ramstein AB (many decades ago) during an IG inspection, C-141 lands uneventfully and acknowledges ground instructions to taxi to MAC ramp.  Weather is fog vis at mins and lower in areas of the base with plenty of trees where of course is where the Starlifter ends up after a left instead of a right.  So now the big boy is lost somewhere among the trees and revetments so an ops truck is quietly dispatched to the area to find the missing bird and guide him to MAC.  All this happened unknown, as far as we know, to the IG inspector in the tower cab.  Great story.

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