This has happened with five GA planes in stable level flight and AP set to HDG or NAV/VOR or NAV/GPS. The problem seems to be in the Garmin G1000.  It has happened with a CH Yoke and with a TA Pilot 320 Flight Stick. 

Plane very suddenly makes a sharp descending bank to left and enters a tight spiralling dive.  I can usually recover if I have 5,000 feet or more to work with.  

Everytime it happens I find the elevator trim set to 100% DOWN AFTER I turn off the AP. That is why it is hard to recover - I have to manually move the trim back to the appropriate setting for that plane/power setting. 

It is a rare occurrence but has happened many time.  

I have searched the control settings and find none that would lead to an inadvertent setting of 100% down elevator trim. 

Is this an issue anyone else has dealt with?

FS 2024 / Steam Beta

 

The most obvious explanation would be an unexpected control binding. Perhaps you have the down trim set to some button or key that you’re not aware of, and then you hit that key or button, and down you go. You could go into the Controls menu and search for everything related to trim, and see what comes up. 
 

 

8 minutes ago, prolixindec said:

The most obvious explanation would be an unexpected control binding. Perhaps you have the down trim set to some button or key that you’re not aware of, and then you hit that key or button, and down you go. You could go into the Controls menu and search for everything related to trim, and see what comes up. 
 

 

You are SO right!

I had created a new keyboard profile that is supposed to be for ALL aircraft as default.  I had deleted all the trim entries from that profile.

For whatever reason, the sim was using the default keyboard as delivered with the sim which includes K= trim down elevator.  Whenever I was flying with the AP and tried to enter a Direct To airport in the US which begins with K - I got full down trim.

I thought I had solved this problem months ago but I guess during one of the updates the sim reverted to the original default profile.  I found no copy of the newer default I thought was in use.

Thanks for reminding me about the keyboard!

Edited February 23, 20251 yr by TacomaSailor

It was either that, or MCAS...  😗

Glad you got it sorted out!

 

Edited February 23, 20251 yr by prolixindec

My problem was that I had made the "new" default profiles for the keyboard and mouse months ago.  When I enter Settings/Controls I do not see a profile listed for either the mouse or keyboard unless I select them.  And, until yesterday I had no reason to check the profiles.

I guess the message is to check all the profiles (I have six controllers - all with heavily customized profiles) for each controller attached to the sim  - each time I start the sim.

Why can't the sim leave profiles alone?