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PMDG--737 VNAV DOES NOT ENGAGAE ANYMORE

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Since a couple of months VNAV does not angage anymore.

Any idea what the reason could be

Thanks

Paul12

Herbert Werni

The reason is likely how you set up the aircraft which prevents VNAV from engaging according to real world logic of the systems. Have you changed something in operating the plane? Are you doing anything differently than before? I don't know of any bug in the NGX that would prevent VNAV engagement and there was no update to the product/nothing was changed from the developer's side, which is why it's probably user related.

In any case, we need some more information. In what situation does it not engage? How did you set up the aircraft?

Most likely your elevator axis is not centered and you have not configured the 737 to disable real-world autopilot connection behavior.

Bob Scott | President and CEO, AVSIM Inc
ATP Gulfstream II-III-IV-V

Sys1 (MSFS20+24/XPlane12+11): AMD 9800X3D, water 2x240mm, MSI MPG X670E Carbon, 64GB GSkill 6000/30, nVidia RTX4090FE
Alienware AW3821DW 38" 21:9 GSync, 2x4TB Crucial T705 PCIe5 + 2x2TB Samsung 990 SSD, EVGA 1000P2 PSU, 12.9" iPad Pro
Thrustmaster TCA Boeing Yoke, TCA Airbus Sidestick, Twin TCA Airbus Throttle quads, PFC Cirrus Pedals, Coolermaster HAF932 case

Sys2 (P3Dv5/v4): i9-13900KS, water 2x360mm, ASUS Z790 Hero, 32GB GSkill 7800MHz CAS36, ASUS RTX4090
Samsung 55" JS8500 4K TV@60Hz,
3x 2TB WD SN850X 1x 4TB Crucial P3 M.2 NVME SSD, EVGA 1600T2 PSU
Fiber link to Yamaha RX-V467 Home Theater Receiver, Polk/Klipsch 6" bookshelf speakers, Polk 12" subwoofer, 12.9" iPad Pro
PFC yoke/throttle quad/pedals with custom Hall sensor retrofit, Thermaltake View 71 case, Stream Deck XL button box

Sys3 (DCS/P3Dv4/ATS/ETS): AMD 7800X3D, MSI MPG X870E Carbon, Noctua NH-D15S, 64GB GSkill 6000/30, EVGA RTX3090
Alienware AW3420DW 34" 21:9 GSync, Corsair HX1000i PSU, 4TB Crucial T705 PCIe5 + 2TB Samsung 970Evo Plus,
TM TCA Officer Pack
, Saitek combat pedals, TM Warthog, TM RS300 FF wheel/pedals, Coolermaster HAF XB case

  • 3 weeks later...
  • 2 weeks later...

Nice video. I can see you're flying about in the low speed warning zone. Had that once when an F/O tried to expedite climb at ATC request with the pitch wheel. Autopilot disengaged the moment it started flashing. I took control and smoothly sorted it but he was a bolshy sod and needed a lesson as he was ignoring my advise. No danger whatsoever I might add. I'd not let him get that far.

 

  

Mark Harris.

Aged 54. 

P3D,  & DCS mostly. DofReality P6 platform partially customised and waiting for parts. Brunner CLS-E Yoke and Pedals. Winwing HOTAS and Cougar MFDS.

Scan 3XS Laptop i9-9900K 3.6ghz, 64GB DDR4, RTX2080.

B737NG Pilot. Ex Q400, BAe146, ATP and Flying Instructor in the dim and distant past! SEP renewed and back at the coal face flying folk on the much deserved holidays!

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