While flying a Landing Approach in Airbus A321 with the FD ON and the AP and AT, OFF, at the moment of a near perfect touchdown  the nose suddenly yaws upwards upto 20 degrees and all the efforts for a safe landing is lost .Why? Can the FD be put OFF during the landing phase? Please advice me on the right way to utilise the FD in FSX/FS2004.Thanks. :)

Try this. BEFORE engaging the AP, ensure that the trim is as neutral as possible. In some (most?) FS planes, as soon you disconnect the AP, the trim returns to the settings it had BEFORE the AP was engaged, and if you engaged the AP soon after having taken off, with take off trim still... :P

It is a problem that was never thought really problematic from M$, whose coders left it alone and undisturbed for years and years, and that only the registered version of FSUIPC gives a solution to. ::)

I believe what you are encountering is the automatic go around on the Airbus.  If the speed and rate of descent are too high, the computer automatically begins a go around to keep you from crashing.  It is one of the ways Airbus has tried to dummy proof the airplane.  It has nothing to do with the FD.

If you have the AP and AT off and you're hand flying the aircraft, there's no reason the nose should pitch up that much unless you're doing it yourself.  The FD can be on or off while hand flying the aircraft.

Strategic Retreat wrote on Oct 29^th, 2011 at 1:39pm:

Try this. BEFORE engaging the AP, ensure that the trim is as neutral as possible. In some (most?) FS planes, as soon you disconnect the AP, the trim returns to the settings it had BEFORE the AP was engaged, and if you engaged the AP soon after having taken off, with take off trim still... :P It is a problem that was never thought really problematic from M$, whose coders left it alone and undisturbed for years and years, and that only the registered version of FSUIPC gives a solution to. ::)

Hi, Strategic Retreat,
Good morning(It is morning hrs. here, in India).Thanks for your speedy response to my post and an appropriate advice. I shall try following the same and hope to keep you informed of the result soon.
About the FSUIPC you have mentioned , I have not any knowledge to install and utilise it. I need some help in this regard. Thanks.

DaveSims wrote on Oct 29^th, 2011 at 6:43pm:

I believe what you are encountering is the automatic go around on the Airbus.  If the speed and rate of descent are too high, the computer automatically begins a go around to keep you from crashing.  It is one of the ways Airbus has tried to dummy proof the airplane.  It has nothing to do with the FD.

Hello Davysims,
Yes, you have touched the right technical aspects of my presnt problem with Air bus A321-the frightening yawing and on the FD functioning- I believe. I have been much enlightened on flying technics.Thanks a lot.

-Crossfire- wrote on Oct 29^th, 2011 at 7:19pm:

If you have the AP and AT off and you're hand flying the aircraft, there's no reason the nose should pitch up that much unless you're doing it yourself.  The FD can be on or off while hand flying the aircraft.

But the Airbus does do just that.  The designers at Airbus believe the airplane is smarter than the pilot.  If the plane doesn't like what you are doing, it won't let you do it.  Microsoft has tried to model much of this, and the automatic go around is part of that.

M.S.M wrote on Oct 30^th, 2011 at 12:32am:

Hi, Strategic Retreat, Good morning(It is morning hrs. here, in India).Thanks for your speedy response to my post and an appropriate advice. I shall try following the same and hope to keep you informed of the result soon. About the FSUIPC you have mentioned , I have not any knowledge to install and utilise it. I need some help in this regard. Thanks.

Hallo to you too. Speaking (or rather writing) from Italy here. :)

Idle considerations about the mythical Airbus-Overmind of some, or the EVEN MORE mythical rumor that M$ may have made a default plane a little better than their barely mediocre average, (we'd really need the Mythbusters on the case, if they hadn't shown to possess the airmanship of a whale, once) the plane should not behave like that. Try Googling for FSUIPC. It's main page is always the first of the results. FSUIPC can be used without paying [the highway robbery price of] its registration, but unregistered it only serves to interface your planes or simulator to other softwares and you won't be able to use the advanced options.

If you have FSUIPC registered, you can find the option that says more or less "etcetera elevator trim at AP disconnection"... or something similar (I haven't my FS PC available at the moment and can't remember very well the option's caption, but it was the sole one that talked about the elevator), and once you have enabled that option, even if you connect the AP after take off and are still with take off trim, you don't need to worry anymore. When you'll disconnect the AP, the elevator trim will remain the same the AP inputed. :)

Strategic Retreat wrote on Oct 30^th, 2011 at 2:33pm:

M.S.M wrote on Oct 30th, 2011 at 12:32am: Hi, Strategic Retreat, Good morning(It is morning hrs. here, in India).Thanks for your speedy response to my post and an appropriate advice. I shall try following the same and hope to keep you informed of the result soon. About the FSUIPC you have mentioned , I have not any knowledge to install and utilise it. I need some help in this regard. Thanks. Hallo to you too. Speaking (or rather writing) from Italy here. :) Idle considerations about the mythical Airbus-Overmind of some, or the EVEN MORE mythical rumor that M$ may have made a default plane a little better than their barely mediocre average, (we'd really need the Mythbusters on the case, if they hadn't shown to possess the airmanship of a whale, once) the plane should not behave like that. Try Googling for FSUIPC. It's main page is always the first of the results. FSUIPC can be used without paying [the highway robbery price of] its registration, but unregistered it only serves to interface your planes or simulator to other softwares and you won't be able to use the advanced options. If you have FSUIPC registered, you can find the option that says more or less "etcetera elevator trim at AP disconnection"... or something similar (I haven't my FS PC available at the moment and can't remember very well the option's caption, but it was the sole one that talked about the elevator), and once you have enabled that option, even if you connect the AP after take off and are still with take off trim, you don't need to worry anymore. When you'll disconnect the AP, the elevator trim will remain the same the AP inputed. :)

Hallo , Strategic Retreat!
It is very nice  of you to be so much concerned to help me out of this technical problems with the Airbus A321 and I have since grasped the essence of your advice. I shall try to get a registered copy of the FSUIPC as quickly as possible. I am always zealous to sharpen my flying skills and always aim fly the planes to professinoaly perfect. Thanks a lot, dear freind.

We do what we can with what we have. You try to help someone today out of a snag, someone else will try to help you tomorrow out of another snag. That's all folks. ;)