Autopilot does not work

[Budbud 227]

Hi,

There is definitely something wrong. The aircraft cannot be levelled off with a pith of -5 degrees. I can remember that there was something a similar issue with levelled off nose down attitude in on of the fora but cannot remember what it was.

I'll try to do a little search and see what comes up. Meanwhile you can try to search also on your side.

Edit:

I found the thread I thought off:

Try deleting the fsuipc profile and do a fresh new one.

[downscc 1,327]

Pitch mode is in VNAV SPD and pitch reflects a nose down attitude to maintain flaps up minimum speed.  Looks suspiciously like FSUIPC problem.  That module has been know to cause problems with flap axis that resemble this somewhat.  Move the FSUIPC ini to your desktop and try the simulation.

[Captain Kevin 586]

Looks like you also have another problem with regards to fuel imbalance.

[Mike777 163]

4 hours ago, Budbud said:

There is definitely something wrong. The aircraft cannot be levelled off with a pith of -5 degrees. I can remember that there was something a similar issue with levelled off nose down attitude in on of the fora but cannot remember what it was.

There's a known issue when the flaps are using FSUIPC (this is in FSX) that the flaps look like they are up but the sim sees them as down.  However that happens in all modes, not just LNAV/VNAV.  But I agree that the OP should try eliminating FSUIPC to see if the problem goes away.

Mike

[ARTS 0]

10 hours ago, PMDG777 said:

 

[ARTS 0]

10 hours ago, PMDG777 said:

Select FL CHG, what happens?

When you click anything, it does not react to it

Artem Bulavin

[ARTS 0]

All pilots thank you for the answers and tips. It was in FSUIPK, deleted the profile and everything became as it should. Once again, thank you all. The topic can be closed.

Artem Bulavin