Narrative:

A serious violation of madison, wi, class C airspace by approximately .4 NM at about 2000 ft MSL. We were on a planned cap training/demonstration flight. We'd filed a round robin VFR flight plan with green bay FSS, wausau to portage and back. I absolutely had no intention of going near madison, so did not tune in approach. We received a surprise additional training assignment. Where's that? We were told approximately 18 NM on the 310-315 degree radial of the 108.6 VOR. While intercepting +/-2000 ft MSL I noticed 4.6 NM on the DME and turned away. After landing at portage (C47) we had a bad time telephoning msn. Need to be more vigilant. Not again! Need to take more time to reorient and plan, before departing your known position for a new one! Should have, and could have, simply flown the 18 NM arc around to the 315 degree radial area from the +/-340 degree radial I was on versus the mind set of going to the VOR and back out. The cap is all safety. I attend various safety meetings yrly, and read such publications as AOPA pilot, flying, NASA/ASRS callback, IFR refresher, etc. I've brought up my mistake with fellow pilots and it has been well discussed. Must keep trying and learning.

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Original NASA ASRS Text

Title: C182 PLT INCURRED MSN CLASS C AIRSPACE.

Narrative: A SERIOUS VIOLATION OF MADISON, WI, CLASS C AIRSPACE BY APPROX .4 NM AT ABOUT 2000 FT MSL. WE WERE ON A PLANNED CAP TRAINING/DEMONSTRATION FLT. WE'D FILED A ROUND ROBIN VFR FLT PLAN WITH GREEN BAY FSS, WAUSAU TO PORTAGE AND BACK. I ABSOLUTELY HAD NO INTENTION OF GOING NEAR MADISON, SO DID NOT TUNE IN APCH. WE RECEIVED A SURPRISE ADDITIONAL TRAINING ASSIGNMENT. WHERE'S THAT? WE WERE TOLD APPROX 18 NM ON THE 310-315 DEG RADIAL OF THE 108.6 VOR. WHILE INTERCEPTING +/-2000 FT MSL I NOTICED 4.6 NM ON THE DME AND TURNED AWAY. AFTER LNDG AT PORTAGE (C47) WE HAD A BAD TIME TELEPHONING MSN. NEED TO BE MORE VIGILANT. NOT AGAIN! NEED TO TAKE MORE TIME TO REORIENT AND PLAN, BEFORE DEPARTING YOUR KNOWN POS FOR A NEW ONE! SHOULD HAVE, AND COULD HAVE, SIMPLY FLOWN THE 18 NM ARC AROUND TO THE 315 DEG RADIAL AREA FROM THE +/-340 DEG RADIAL I WAS ON VERSUS THE MIND SET OF GOING TO THE VOR AND BACK OUT. THE CAP IS ALL SAFETY. I ATTEND VARIOUS SAFETY MEETINGS YRLY, AND READ SUCH PUBLICATIONS AS AOPA PLT, FLYING, NASA/ASRS CALLBACK, IFR REFRESHER, ETC. I'VE BROUGHT UP MY MISTAKE WITH FELLOW PLTS AND IT HAS BEEN WELL DISCUSSED. MUST KEEP TRYING AND LEARNING.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.