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sofence

RNAV Approach issues

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Hi,

 

I've tried an RNAV approach at KPAE (plain field) on runway 34L, but while pushing the APP button on the MCP, nothings happens, so I had to continue on a visual approach. I actually tried this RNAV approach three times and same result, nothing...

 

Somebody have the same issue? 

 

Thanks.

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Why do you think you need to push the app button for a RNAV approach. genuinely curios?

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Why do you think you need to push the app button for a RNAV approach. genuinely curios?

 

I think it comes back to the whole "This isn't the 737"  :lol:

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I think it comes back to the whole "This isn't the 737"  :lol:[/quote

 

Ah ok :) never flown the NG, was wondering why he would think that would be a correct procedure on T7]

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I am having the exact same issue. No ILS FREQ is put on the radios hence forced to proceed visually. How do I put it manually anyway?

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Let me do that procedure once again JUST with the LNAV and VNAV activated and I'll come back to you.

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Ah ok :) never flown the NG, was wondering why he would think that would be a correct procedure on T7]

 

I never used the feature in the NGX personally - but I think it was called 'Iron' mode or something. Basically created a LOC/GS on the PFD if you were doing a non-precision approach. So you didn't have to use LNAV/VNAV.

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I am having the exact same issue. No ILS FREQ is put on the radios hence forced to proceed visually. How do I put it manually anyway?

By reading the documentation that came with the aircraft.

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Let me do that procedure once again JUST with the LNAV and VNAV activated and I'll come back to you.

 

I tested RNAV's heavily during testing and never saw issues. Remember to set Missed Approach Altitude at least 300ft BELOW passing the MAA. 

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I never used the feature in the NGX personally - but I think it was called 'Iron' mode or something. Basically created a LOC/GS on the PFD if you were doing a non-precision approach. So you didn't have to use LNAV/VNAV.

Interesting, I should have a read through the NG FCOM when I get a chance.

 

Cheers

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Here: FCTM Pg 5.29. I didn't trust my memory and had to double check that LNAV/VNAV are intended to fly the RNAV approaches. You will notice the the RNP/ANP values will change once you are in the approach that is in the flightplan.

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Probably, I don't love reading, even when it's about PMDG's aircraft, but I read a bit of the FCOM :P
 
And no problem for the missed approach altitude and all that stuff I can handle it... I thinks ;)

Just to make something clear in my mind, on the RNAV approach charts, I see LPV (stand for Localizer Performance with Vertical Guidance) I read a bit and I saw : 

 

 

LPV approaches take advantage of the refined accuracy of WAAS 

lateral and vertical guidance to provide an approach very similar 
to a Category I ILS

 

Is this your 'Iron' mode EGLL77W? Or am I wrong once again?

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Is this your 'Iron' mode EGLL77W? Or am I wrong once again?

 

 

Negative.... If you use Nav Perf option (RNP/ANP scales on PFD/ND) then on RNAV's, the scales give indications that are just as or more accurate than the ILS. 

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I never used the feature in the NGX personally - but I think it was called 'Iron' mode or something.

 

I think you are referring to the IAN "Integrated Approach Navigation" in the 737. It computes a vertical decent path for you and allows you to fly a non-precision approach using the same procedures as you use for an ILS. It is actually a pretty cool feature but (to the OP) it is dangerous to assume that it is implemented in the 777 just becuase the 737 has it. :smile2:

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I think you are referring to the IAN "Integrated Approach Navigation" in the 737. It computes a vertical decent path for you and allows you to fly a non-precision approach using the same procedures as you use for an ILS. It is actually a pretty cool feature but (to the OP) it is dangerous to assume that it is implemented in the 777 just becuase the 737 has it. :smile2:

 

That is the post that make my mind clear thanks! Now I understand and i'll read all the FCOM, I will now mark this post solved ;)

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