I've been using the iPad app iFMS for default aircraft in FSX and having mostly an easy time of it.
One issue that still crops up is VNAV descents using autothrottle.
If I disable A/T and manually control power to follow the speedbug that iFMS has calculated I can follow the descent pattern and I end up where I'm supposed to.
If A/T is engaged, the aircraft does not spool down power enough to maintain the set speed. There are several times when idle is necessary (but still not needing speedbrake) but power remains above idle. This makes me overshoot the intended VNAV plan.
Is there a way to tweak the A/T power settings for descent?