This started right after I started to decrease altitude. The turns are so extreme that o got a bank angle warning.
This provides literally zero information for us to help you. What modes are engaged? What’s the approach? Any screenshots? I can assure you, if flown properly, the aircraft does not make extreme turns.
Alt, VS, Speed, HDG. Literally everything. ALl done by AP.
OK, you still are not really helping to help you. If you can’t be bothered more than 10 words to describe your issue, perhaps you can just read the manual and figure out what you are doing wrong.
Its described here:
What do you mean by approach? Screenshots? I already finished flight and for this a video would be better. What else do you need?
Descending from what altitude or flight level? Altitude in the window on the MCP that you were descending to? And from what waypoint or airway departed to the next waypoint, airway or airport approach procedure. Final destination & runway? Course & heading set in the MCP windows. And whatever other navigation information you can recall so others can make a mental picture of what your flight status was when the deviations occurred. Thanks for sharing.
Are you sure the the PMDG forums link you’ve posted is the correct one for the issue you’re having? The reason I ask is that this specific forum link is for an issue with shallow turns, whilst your issue seems to be the polar opposite to the extent you get bank angle warnings. You also mention that your autopilot modes are in HDG and that you are in descent, but the PMDG forum link is for LNAV, not HDG select, and when climbing not descending.
Guess it’s not the AP. Would say you deactivated it unintentionally. The AP doesn’t make turns with bank angle warnings.
AP was active, and it was a normal situation between take off and landing. Alt was hold, IAS active, LNAV active etc. Then i changed alt level (decrease 5000 feet with VS of -1000 … and that the terror started.
The next waypoint was round about 30–40 miles away and the 737 was perfectly on course.