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 10 autoland 4.3 questions (Read 10442 times)
Neil
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Re: Autoland Problem
Reply #15 - Jun 12th, 2009 at 9:49pm
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Neil wrote on Jun 11th, 2009 at 12:40pm:
Hey guys hoping for a little bit of advice

I have performed a number of autopilot full flight and landings with great success, even being able to achieve a flare on a number of occasions.  However, the past two flights I have performed (EGCC to EGPH) the landing is not working.

The problem seems to be that when I hit the "LOC" and "APP" command buttons, the autopilot fails to intercept the localiser correctly, with the 3 Autopilot lights failing to light up (only the 1 I pressed stays activated).  It seems to descent in line with ILS approach charts however the landing is off to the right of the runway so that I end up landing on the grass or into trees.

I was wondering if it was anything to do with the IRS alignment but I am not sure how I would identify this.  Im pretty sure that I have been entering the correct GPS position into the FMC so I'm pretty much out of ideas on how to fix this problem.

Would it also be possible that there is an error in the FMC data or something.  I have the most up to date AIRAC data installed as well.

Any suggestions would be much appreciated.

Cheers
Neil Riddell


Does nobody have any tips - sometimes I am failing to even get the 3 landing lights to come on.  Maybe advice as to correct procedures/what I can read would be helpful.

Thanks
  
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Tim Capps
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Defense Lawyer & US Navy
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Re: autoland 4.3 questions
Reply #16 - Jun 13th, 2009 at 12:06am
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When you are reporting an intermittent problem, it makes it really hard to troubleshoot based on what we have before us.

Is it just the one airport?  If I were having this problem, I would be trying many different airports to see if there was something odd about the one.  It can be as simple as reading the wrong chart, which would result in the wrong ILS frequence if you were doing it manually.

If I tried several different airports and it worked fine, then I would conclude there was a problem with the one airport and either avoid it or try to figure out what is going on.

If you are having the same problem no matter where you fly, then roll back to when it was you were having great success.  Is it possible you are doing something different?  Have you made any changes to your system since then?

If you are a very experienced simmer with these kinds of aircraft, then you can fake it pretty good, but you are going to have to use the manual to get serious.  I printed out 2,3 and 5 and studied the others on screen.  2 is your expanded checklist that has the steps you need to be following.  3 is technical stuff that you probably need to know.  5 is your FMS.  It is 99 pages long, but mostly in outline form with illustrations.  It isn't really a huge task to print out and is relatively easy on ink cartridges.

Screen shots would help, if you can do that.

Are you obtaining your charts and following them?  How far out are you intercepting the extended centerline of the runway?  What speed and flap setting? Do you have LOC button pushed, correct frequency and course set for ILS?  Does LOC appear on your PDF?  Does it turn green?  We have to figure out where in the whole sequence things are getting messed up for you.
  

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Neil
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Re: autoland 4.3 questions
Reply #17 - Jun 14th, 2009 at 11:52am
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Hey Tim

Thanks for your help - I think I have sorted the problem.

I tried a number of different airports and was able to get the autoland to work.  The thing that I did differently on these successful lands - tuning in the ILS frequency myself.  Now it seems to work all the time!  Even getting correct descent rates and a true flare on landing!

Cheers
  
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Echo
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Hard Autoland
Reply #18 - Jun 17th, 2009 at 3:52am
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I have been flying this bird for about 3 weeks, yea, I'm a new but converted CS 757 jock.  Anyway the first time I used Autoland, the plane hit the runway hard.  I was suprised not to see a crash scene.  When I looked at the external view, every one of the doors, access panels, and even the engine cowls were open.  I couldnt get them closed.  I think it was just a animation issue as I never did get any of the door warning lights in the cockpit.  Anyone else ever see this?
  

Boeing 757-200 and 727-100 owner/operator
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