I have observed the following several times:When autopilot is in approach mode, altitude hold mode is off, and ILS is captured, the J41 descends slowly although it is already below glideslope. Only if the autopilot is in altitude hold mode before the ILS is captured, the glide path is correctly followed.Is this as it should be?Michael

I would like to know this as well. If the approach mode is selected during a descent, it overrides the previously set altitude selection. You must then reselect the altitude select mode for the autopilot to capture and hold it at altitude. As Michael said, is this the way the real one works?