Hi, I have a doubt about the coding of the A / P disengage that is present in the MCP of the Boeing 738.

It seems to me that the big lever, present under the CWS A and CWS B buttons, relative to the A / P Disengage is a "switch".

However in the figure present in "Panel and Instruments Layouts" relating to the MCP (Collins) B737-8 this switch is associated with "AP_All_Disengage" which is managed as "buotton". It's correct? In my case it doesn't work, but it doesn't even work by associating it with the "AP_Switch" parameter.

Thanks for the attention.

Greetings, Claudio
Aug 22, 2019 in Laminar B738 ZiboMod by

2 Answers

Hi, it must have happened that I asked a stupid question, in fact it is not much considered.

I make many mistakes and surely it will have happened again.

In fact I have to think that none of you had the same problem as me, however my MCP will remain unfinished for only one element: AP_All_Disengage. I regret it.

Thanks anyway, Claudio
Sep 2, 2019 by
It is difficult to answer Claudio...
AP_All_Disengage command may mean, A/P, A/Throttle and Flight Directors?

On my GoFlight panel it is a simple switch. It is up for ON, down to disconnect. The mock up is simply a push on bar with lugs to maintain its horizontal position.

Hope this helps
All clear, indeed very clear.

The problem is not the MCP panel and its components, but as SIMVIM manages the switch that enables/disables the autopilot.

I hope it's finally clarified.

This "switch"  (in real MCP)  is just a bar that  prevents the AP engagement when in lowered position.

On the other hand, it acts as a "button" which disengage AP when lowered but it doesn't "engage" it back ( it's one-way action).

I can make this act as switch later, but now you can assign it as AP_Disengage   parameter.
(this parameter is mapped to correct Zibo toggle command)

The  "AP_All_Disengage" is mapped to another command   "laminar/B738/autopilot/disconnect_button",   - I don't see where is this button   is located in the Zibo virtual cockpit.


Nov 26, 2019 by

Please download updated database file (SimVim.dat), replace it in the SimVim plugin folder.

Now, I have added new parameter for the AP disco/prevent bar (see also changes in the configurator image-map for MCP):



Thank you very much Vlad for your work and your understanding. Now everything is as I wanted.

One note only, according to your software, the Disengage switch "AP_OFF_Bar" is "closed" when the bar is down.

Best regards and Merry Christmas.