I was flying PA28 (stock version) VFR approach airport the plane refused to descend even though the stick fully down. The only way I was able to land was to put plane into idle. I took off again and this time used my Yoke sure enough again when I approached a different airport the plane refused to descend. I set the plane to idle and landed.
During this problem I refreshed the Yoke & stick to no avail. The other issue was a drop off in FPM again. No changes in any settings FPM dropped from 60 to around 20. (wasn't AI.
Any ideas