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PMDG 747 X off course
66 replies to this topic
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Posted 23 November 2008 - 10:20 AM
Gary,I've never heard of it being an intermittent problem. I know that some with faulty registry paths have consistent problems with path following.Maybe try to use the Flight 1 registry repair tool (Google it and it should be among the first hits) and see if that helps.
Posted 22 November 2008 - 05:30 PM
No scrren shots but try this and see if this is the culprit ?I found the problem happens after leaving the LNAV and VNAV modes to selcet the FL/CH mode when instructed to either climb or decend ...It happened to me during the DVR 26L departure from EGKK and also tonight on the WILLO4C arrival 26L EGKK.All was fine in the flight until I select the FL/CH mode then select the HDG mode on the autopilot ...Gary B ;o)
Posted 17 November 2008 - 03:13 PM
Hi Jean,I think your problem is different from the topic we are discussing here - for me, the 747 keeps on flying (FSX does not freeze), but the PFD does not reflect the changes to course or altitude correctly. Your problem sounds more like an out-of-memory problem. Does FSX crash after the freeze?Regards,Juergen
Posted 17 November 2008 - 04:49 AM
Hello againi have tried the above mentioned fixes, but no luck.. after about 5 minutes of flight in heading mode, speed mode, and AP on, the 747 starts to bank to left/right and then FSX freezes. anyone have some idea what might be wrong? Jean
Posted 15 November 2008 - 10:02 AM
..just did a short 1 hour flight. I stayed in the VC all the timeand didn't switch to any exterior views at all. Everything was working fine during the whole flight, no deviation at all!So for me it is pretty much clear that when switching to exterior views and then directly back to VC, the PFD is not updated correctly. But switching shortly to the 2D cockpit and then to the VC fixes it.Regards,Juergen
Posted 15 November 2008 - 01:53 AM
I've only been using the 2d but will be looking to that !Sorry no screen shots yet , I've had two days of he'll at work covering sick and extra flights ... The recession don't seem to be affecting my company too much at the moment !Thanks,Gary B
Posted 15 November 2008 - 01:28 AM
Hi,I have exactly the same problem. After a little testing I found out that the display of the PFD is freezing after a little while in the VC (but not in the 2d view). It mostly happens during cruise or during long climbs. In order to "reactivate" the PFD I switch to the 2d view, then back again. This works, but it is a little bit tiresome to do this every minute or so.Regards,Juergen
Posted 12 November 2008 - 01:28 PM
Hi GaryCan you give us just a tad more info please. I would like to know 1..Where in the route does it happen. Start, M, End..Near ToD etc etc.2..Does it correct over time or just go crazy?3..Do you have a STAR programmed when it happens?4.. When it does it on HDG SEL is this after you have switched from FMC?5..Does it do it if you fly manually then go to autopilot (No FMC programming)If you could answer these or test them it could help with detection.ThanksSteve
Posted 12 November 2008 - 11:17 AM
Thanks for replying Dan,Its not the mag / true hdg selector and I also have had the weather set to calm ... it still does it ...Somtimes the aircraft will make a complete 180 degree turn or more off track before correcting ...Happens pretty much every time I use the #### thing !I have even tried re-alighning the IRS's before use but stil has no effect ...Anyways it's too much of a good product for FSX to leave it in the hanger gathering dust ... so I will just have to fight her until there is some sort of a solution ...Gary B ;o)
Posted 10 November 2008 - 06:09 PM
I hate to reply without a resolution, just a comment to say that, yes I have seen this behavior many times. At first I thought it was wind but had weather set to (and reset to) clear with no winds. Even then it should stay on course. I have been waiting for it to happen again since my guess is that somehow I hit a possible keyboard shortcut to change the heading from Magnetic north (the default) to True north. It is a switch above the Eicas display. The difference is usually about the same distance the plane strays. It's either that or maybe somehow it got a command to offset the course buy 10 degrees? Again though, I amwaiting for it to happen again to see, but since now I am waiting for it to happen, it probably won't, haha.Dan
Posted 10 November 2008 - 03:23 PM
Evening all,I've recently been having this problem with the 747X losing its course when on LNAV mode and also on HDG mode.It happens during flights randomly when all of a sudden the auto pilot decides to go swaning off in its own direction for about a minuite before coming back on course to follow the FMC pink line ... when it dives off course i try to correct it by selecting an appropriate heading on the HDG selector and activating it but this has no effect.Even the HDG selected on the autopilot alone does the same thing of wandering off course.I have tried the other autopilot command switches along with switiching on and off the auto system and still it will do its own thing until it decides to start following orders again ...A complete uninstall then a reinstall has no result either ?Anyone else had this problem or could steer me in the right direction for a solution ???Thanks,Gary B.
Posted 10 January 2009 - 01:58 PM
I have the same issue, and running the Registry Fix hasn't changed anything. Here is a screenshot I managed to take on my last flight. This seems to happen every flight now as soon as I'm more than 2hrs in. Any help would be greatly appreciated!!Cheers,Dan
Posted 29 August 2010 - 02:34 PM
Hi All, I just got the 747X and it is a great product, My problem however is not concerning the LNAV but the pitch mode VNAV. During cruise with autoflight on VNAV/LNAV the nose would sometimes pitch up and climb for a few thousand feet before remembering what it was supposed to do and slowly finding its way back to my set altitude. Anyone experiencing something similar or having a solution?thanksN.J.D
Posted 17 June 2011 - 05:06 AM
Just to add to the list of people with this problem, I have exactly the same thing. All's fine for the first 2 hours, then you have to fight it all the way to try and get it to fly straight.It starts by wandering off course, then the bank angle starts getting steeper with each change of direction. Altitude hold then goes and the only way you can get control back is to take over manually, get your heading and height about right and then re-engage to autopilot in HDG and ALT mode.I've tried all the fixes suggested above concerning registry entries, views etc. , but to no avail. I've also tried different AIRACS, but that makes no difference. As has been said above, this is a great product, but I'm afraid that until we get a working fix for this, I'm going to be leaving mine in the hanger for long flights.Maybe after the 737NGX is released, people will have more time to look into this problem.FSX SP2 Accel Win7 32bit
Posted 17 June 2011 - 08:05 AM
Well I have the same problem here as well. Just yesterday flew from yssy - klax. On the descent in at 11500 ft the thing acted liked it was lost s turning like crazy. It will also get really shifty climbing out of narita. I have read alot about this and no aftermarket stuff here just the 747x the md-11 and a registerd fsuipc. By the way never had the md-11 do this. I really hope someone can find a solution for this nagging problem.Shannon Stewert