JeeHell FMGS forums

Hi all,

since some months I am experiencing an abrupt nose down of the plane, when I pull the ALT knob for a selected lower ALT.
Before the movement was much softer.

This happens with different weights & balances. I can't say since when exactly. I just know, this wasn't the case before and I haven't made any changes to my flight model.

Decending in managed mode works fine.

Is this only me or do you experience similar?

I have the same issue, only when pulling the ALT Knob (OP DES)
Managed mode DES or V/S still smoothly pitch down.

Same here ! It started with B59…
Br Mic

Same issue here, tested with B59.1 and B61 in Prepar3D V6.
Sometimes (not always) Open Descent is far too aggressive with 10° pitch down, sink rates of up to 8000 ft/min, and increasing speed.




My Workaround is to disconnect the Autopilot, pull ALT and wait for about 20 seconds until the FD normalises. Then engage the AP again.
Any ideas?

I still had this issue with B61.4.2.
Autopilot Open Descent is too much aggressive pitch down, "Don't Sink" GPWS and speed increased close to Vmax red line.

No issues with B61.4.2 and P3Dv5.3 so far. Just tested yesterday.
INIT A and INIT B pages in MCDU properly set?