cmbaviator Posted May 23, 2016 Report Share Posted May 23, 2016 Hi guys Well after passing T/D and starting the descent, I went on Youtube to watch a video, after several minutes I noticed that VNAV was disengaged and A/T was on ARM mode on the FMA. if i recall correclty, the only way to get back to VNAV was to engage N1 mode or V/S and then press VNAV again to work. A friend had the same issue. As i wasn't there when the bug appeared, I need people to confirm if they had this odd behaviour. Quote Link to comment Share on other sites More sharing options...
Litjan Posted May 23, 2016 Report Share Posted May 23, 2016 I would put money on VNAV overspeeding (getting within 10kts of the upper speed limit) due to a steep segment. Jan Quote Link to comment Share on other sites More sharing options...
FloB Posted May 23, 2016 Report Share Posted May 23, 2016 (edited) You left the cockpit during flight and without FO? Are you totally crazy? Flo Edited May 23, 2016 by FloB Quote Link to comment Share on other sites More sharing options...
cmbaviator Posted May 23, 2016 Author Report Share Posted May 23, 2016 34 minutes ago, FloB said: You left the cockpit during flight and without FO? Are you totally crazy? Flo do you think I'm gonna stay 1 hr on xplane during cruz+descent whereas i can do other stuff ^^ Quote Link to comment Share on other sites More sharing options...
cmbaviator Posted May 23, 2016 Author Report Share Posted May 23, 2016 40 minutes ago, Litjan said: I would put money on VNAV overspeeding (getting within 10kts of the upper speed limit) due to a steep segment. Jan isn't the B737 CL smart enough to pitch up when he's dangerously approaching that upper limit ? Quote Link to comment Share on other sites More sharing options...
Litjan Posted May 23, 2016 Report Share Posted May 23, 2016 It´s smart enough to first disengage VNAV 1 Quote Link to comment Share on other sites More sharing options...
kopek666 Posted May 23, 2016 Report Share Posted May 23, 2016 6 hours ago, cmbaviator said: Hi guys Well after passing T/D and starting the descent, I went on Youtube to watch a video, after several minutes I noticed that VNAV was disengaged and A/T was on ARM mode on the FMA. if i recall correclty, the only way to get back to VNAV was to engage N1 mode or V/S and then press VNAV again to work. A friend had the same issue. As i wasn't there when the bug appeared, I need people to confirm if they had this odd behaviour. Yes, I have the same issue, on my descent (VNAV mode), I put my throttle full back to not overspeed and when I want to put more throttle (because my speed was 10 knots below speed reference, I can't do that. bitmaps showing AT position works well but the quandrant don't move. And I have this same issue on landing (landing with SPD mode and pull back throttle on touchdown) and when I want to taxi out, I can't do that, A/T on. I disconnect A/T, nothing, I must engage A/T, SPD mode and disconnect A/T for taxi out Quote Link to comment Share on other sites More sharing options...
Litjan Posted May 23, 2016 Report Share Posted May 23, 2016 1 hour ago, kopek666 said: Yes, I have the same issue, on my descent (VNAV mode), I put my throttle full back to not overspeed and when I want to put more throttle (because my speed was 10 knots below speed reference, I can't do that. bitmaps showing AT position works well but the quandrant don't move. And I have this same issue on landing (landing with SPD mode and pull back throttle on touchdown) and when I want to taxi out, I can't do that, A/T on. I disconnect A/T, nothing, I must engage A/T, SPD mode and disconnect A/T for taxi out User error - you need to regain control of your thrust levers as mentioned and shown on the tutorial videos. Please watch them for how to do that. Jan Quote Link to comment Share on other sites More sharing options...
kopek666 Posted May 23, 2016 Report Share Posted May 23, 2016 OK, I must be honest I don't see manuals or videos (I have a little experience, flight sim, not real, on 737 NG) But if it is an human error, I will read and study video, sorry if I lost your time Quote Link to comment Share on other sites More sharing options...
Litjan Posted May 23, 2016 Report Share Posted May 23, 2016 44 minutes ago, kopek666 said: OK, I must be honest I don't see manuals or videos (I have a little experience, flight sim, not real, on 737 NG) But if it is an human error, I will read and study video, sorry if I lost your time Oh, don´t be sorry - I am here anyway . But yeah, go ahead and watch a few of those and it should answer quite a few questions you have! Easier than me explaining everything here in the forums . Jan Quote Link to comment Share on other sites More sharing options...
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