A SMA ON A VOR A/GPS-A APCH TO AUW RWY 30 MADE A LOW APCH TO CWA RWY 26. A TRANSITION FROM IMC TO VMC CAUSED A QUICK INCORRECT DECISION.

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APCHING AUW I WAS CLRED FOR A VISUAL APCH. WENT INTO IMC AND ABANDONED APCH AND CLBED TO SAFE ALT AND REQUESTED VOR A/GPS-A APCH. WAS CLRED FOR THE APCH FROM THE N SIDE OF THE ARPT VIA IAF OF PAFDE 7 MI DME ARC OFF OF AUW. WHILE ON THE ARC I WAS IN IMC. I STARTED THE TURN ONTO THE INBOUND APCH COURSE. AFTER I WAS IN THE TURN I WENT INTO VMC CONDITIONS AND THE ARPT APPEARED. I HAD A CLR SHOT TO THE ARPT AND WAS CLRED FOR THE VISUAL AND I CANCELED MY IFR. I CONTINUED TO THE RWY AND NOTED THAT THE RWY NUMBER WAS NOT THE ONE OF MY INTENDED LNDG. ACTUALLY; AUW HAS RWY 30 AND THE RWY IN FRONT OF ME WAS RWY 26. I REALIZED THAT I WAS AT CWA AND NOT A AUW. I HAD BUSTED THE CLASS D AIRSPACE. I IMMEDIATELY DID A GAR AND CALLED CTR TO INFORM THEM OF MY ERROR. I WAS THEN CLRED FOR THE VOR A/GPS-A APCH AT AUW AND MADE A SUCCESSFUL APCH AND LNDG. I CALLED TWR AT CWA AND EXPLAINED THE EVENT. LATER IN THE DAY I WAS ASKED TO CALL MSP CTR WHERE I WAS ASKED ABOUT WHAT CAUSED THE EVENT BECAUSE I WAS NOT THE FIRST TO DO THIS. THIS WAS A VERY GOOD DISCUSSION ABOUT THE CIRCUMSTANCES AND EVENTS THAT LED TO THIS WITH SOME GOOD DISCUSSION ABOUT THE DESIGN OF THE APCH. MY RECOMMENDATION IS THAT THE DME ARC SEGMENT OF THE APCH THAT POINTS YOU TOWARD CWA (NORTHEASTERN ARC) AS YOU ARE MAKING YOUR TURN ONTO THE FINAL APCH SHOULD BE ELIMINATED FROM THE APCH. ALSO; THERE ARE NO RADAR SVCS BELOW 3500 FT IN THE AREA.