Hello,

I am using the Winwing MCDU and it will work at the start of my flight, roughly 30ish minutes in the MCDU will freeze. The MCDU will still work inside the sim but not on the MCDU. How do I figure out what is causing this issue?

Regards,

Tyson

Edited February 14Feb 14 by tdohrer

It's a known issue that we have been waiting months for a resolution either from Inibuilds or WinCtrl.

There are some work arounds if you search the forums but no fix so far.

On 2/13/2026 at 5:16 PM, tdohrer said:

How do I figure out what is causing this issue?

As Pilot061 said, there’re are workarounds but no fix as of yet.  Three easy workarounds that are simple to accomplish but are definitely immersion killers:

1.) Unplug your MCDU and plug it back in, screen functionality restored until next time

2.) Using a powered and switchable USB hub, a power cycle (off/on) does the same as #1

3.) in SimApp Pro, select the MCDU and you can switch the MCDU from Pilot’s command (left side) to co-pilot’s command (right side) and back again if needed for the next freeze.  This too restores functionality but like in all cases, the freeze returns.

IT NEEDS TO BE SAYS SAID:  Both the Fenix and FSLabs airbuses when using the same WinCTRL gear, same SAP NEVER freeze up.  Never been a problem for them, only the ini a340-300 which is the ONLY ini airbus with a working external physical MCDU.  Unfortunately it does not remain working but better than no working external physical MCDU I suppose.

-A

Edited February 15Feb 15 by Arty57

There is a 4th Option: In SimApp Pro simply push the "Reset Default Configuration" button.

I have same problem too.

Does the SAP have a logging function?