I am experiencing a very specific PMS50 GTN750 integration problem in the Black Square TBM 850 in MSFS 2024.

The PMS50 GTN750 Premium popout provides the full VNAV functionality, while the GTN750 instance integrated into the cockpit only provides VCALC. Very strange. Attached Screenshots show the prob.

System:

• Microsoft Flight Simulator 2024
• Black Square TBM 850
• PMS50 GTN750 Premium
• PMS50 version: 2.2.64p
• License: Premium, Active, Lifetime
• WTT Mode: Internal
• COM/NAV index: 1
• Navigraph database: 2609 rev 1

The problem is as follows.

In the PMS50 GTN750 popout:

• The Utilities page contains VNAV
• The page is shown as “VNAV Profile”
• VNAV constraints are displayed, for example 600 FT
• “VNAV Enabled” is available

In the GTN750 integrated into the TBM cockpit:

• The Utilities page only contains VCALC
• The page is shown as “Utilities - VCALC”
• Target ALT is displayed, for example 3000 FT
• Target Waypoint remains “-----”
• There is no VNAV Profile page
• No VNAV constraint is available

The Autopilot page is present in both instances and both instances show the VNAV button.

The two GTN750 instances do synchronize flight-plan data. For example, setting or clearing the origin in the popout is reflected in the cockpit GTN, and vice versa. The system status is also identical in both instances:

• PMS50 version 2.2.64p
• Premium license active
• WTT Mode: Internal
• COM/NAV index: 1
• Navigraph database: 2609 rev 1

Therefore, this does not appear to be a licensing, version, database, or basic synchronization problem.

I also checked the installed packages. My Community folder contains:

• bksq-aircraft-tbm850
• pms50-instrument-gtn750

The TBM package contains a PMS50 integration. I do not have a separate old PMS50 WTT TBM package installed, and I do not have the TDS GTNxi installed.

The issue also does not appear to be related to the AP, FD, ALT ARM, or VNV controls. The cockpit GTN does not offer VNAV in the first place; it only offers VCALC. The popout, however, offers VNAV correctly under the same flight conditions.

Has anyone seen the same behavior before? Help is greatly appreciated

Thank you for any help!

Kai