I'm about 10nm out from TNCM, descending, gear down, throttled back, in the CRJ 200 when all of a sudden I totally lose engine power and power to some of my instruments. I was just about at the next waypoint and in my continuing glide the AP actually executed the turn. I had x-plane set for no random outages. and when I checked each tab in the systems failures area everything was in the green. I'm attaching two screen shots. (Hopefully the "attach" process works - the advanced loader would freeze on me so I used the basic loader). Earlier in the week I had experienced a pitch oscillation problem. Cameron sent me a revised acf file, I did a reinstall of the CRJ 200, swapped acf files, plugged back in my new navdata and all seemed well. I started the flight with engines running, programmed the FMS, took off, punched the APENG and she flew like a charm until the moment mentioned in the first paragraph. I had plenty of fuel on board and rendering was set to default. Any help would be most appreciated! Paul