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Can't engage AP after takeoff

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    Can't engage AP after takeoff

    Hi everyone,

    I'm having a few problems with the Autopilot at the moment. Just doing a short flight and after takeoff I've configured the aircraft:

    1. LNAV and VNAV armed
    2. Autothrottle Armed
    3. No pressure on the controls
    4. Aircraft on heading to first Waypoint

    And the Autopilot won't connect. I occasionally see a brief flash of green on the button but it won't engage.

    Any idea what I'm doing wrong?

    Many thanks
    Warwick Finch
    YSCB

    #2
    aaaaand I'm an idiot - need to have IRS set to "Normal".

    Problem solved...
    Warwick Finch
    YSCB

    Comment


      #3
      Originally posted by Maarp View Post
      aaaaand I'm an idiot - need to have IRS set to "Normal".
      Now you have me really curious, what did you have it set on before.
      Captain Kevin

      Kevin Yang

      Comment


        #4
        There's no position that you'll ever need to set your IRSs in normal operation other than "NAV" and you do it as soon as you arrive to the airplane and get AC power..
        Omar Josef
        Spain

        Comment


          #5
          Originally posted by Aeromar View Post
          There's no position that you'll ever need to set your IRSs in normal operation other than "NAV" and you do it as soon as you arrive to the airplane and get AC power..
          dont u align between legs? everytime im getting off a 737 and peek in the cockpit the screens are off (either off or align it looks like)
          Mike Teague - p3dv4.5 - B736 B737 B738 B739 B77L B77W B744 B748

          Comment


            #6
            Originally posted by kvuo75 View Post

            dont u align between legs? everytime im getting off a 737 and peek in the cockpit the screens are off (either off or align it looks like)
            We usually don't - unless you get an FMC message related to navigation accuracy or at some certain airports where it tends to get into alignment problems.
            There's one airport in our network from my homebase where it likes to loose alignment once you lineup on the runway. If we're there we always do a quick realign.
            It's also done on a crew change if we recieve the aircraft directly from the previous crew (normally we'd shut it down to cold and dark and the next crew powers it up again).
            Apart from those three situations we'd normally not realign (or quick align) during a turnaround.

            Comment


              #7
              Originally posted by Captain Kevin View Post
              Now you have me really curious, what did you have it set on before.
              Hi Kevin,

              Not the IRS align switches, but rather the toggles on the Navigation panel. They were all in random places.

              Cheers
              Warwick Finch
              YSCB

              Comment


                #8
                Originally posted by Maarp View Post

                Hi Kevin,

                Not the IRS align switches, but rather the toggles on the Navigation panel. They were all in random places.

                Cheers
                Those shouldn't play a role in autopilot engagement.
                One point you missed earlier on was the stab trim cutout switches. We're flying a MAX (yet) so you can safely return them to NORMAL which is indeed required for AP engagement.

                Comment


                  #9
                  Originally posted by Maarp View Post

                  Hi Kevin,

                  Not the IRS align switches, but rather the toggles on the Navigation panel. They were all in random places.

                  Cheers
                  Those only affect the information displayed. The FCOM has all the information.
                  Omar Josef
                  Spain

                  Comment


                    #10
                    Hi, how are you?
                    Forgiving is the first time and I don't know if you are asking here.
                    Thank you.
                    I have formatted the computer and now it won't let me activate the license.
                    can someone help me thanks

                    Comment


                      #11
                      Originally posted by Maarp View Post
                      Not the IRS align switches, but rather the toggles on the Navigation panel. They were all in random places.
                      I figured you weren't talking about the align switches because that one would have been obvious before you took off. I was just curious what you had it set to since I didn't think that was a switch that one normally uses.
                      Originally posted by Toni_gsxr600 View Post
                      Hi, how are you?
                      Forgiving is the first time and I don't know if you are asking here.
                      Thank you.
                      I have formatted the computer and now it won't let me activate the license.
                      can someone help me thanks
                      First, never a good idea to hijack somebody's post to ask about a completely different issue. Second, activation issues need to go through a support ticket at support.pmdg.com. If you've never done this before, you'll need to create an account since this is separate from the store account. Finally, PMDG requires you to sign your posts with your first and last name, which you agreed to when you created an account here. Instructions on how to do so can be found here:

                      https://forum.pmdg.com/forum/main-fo...pdated-25feb19
                      Captain Kevin

                      Kevin Yang

                      Comment

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