Narrative:

On a training flight with my instrument student, I had him descend to 2200 ft MSL so we could practice NDB navigation below cak airspace. While explaining the use of the NDB and how to track a course, the aircraft climbed to 2500 ft MSL. We were still northeast of the NDB (tracking the 250 degree magnetic bearing to the station). As soon as I noticed the altitude, I initiated an immediate descent down to 2200 ft. I believe that we may have inadvertently entered cak's airspace. Next time I will call up cak and request advisories to prevent this from happening again.

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Original NASA ASRS Text

Title: INST STUDENT INADVERTENTLY CLBED INTO CLASS C AIRSPACE RESULTING IN THE INSTRUCTOR PLT TAKING ACFT CTL AND IMMEDIATELY EXITING PENETRATED AIRSPACE.

Narrative: ON A TRAINING FLT WITH MY INST STUDENT, I HAD HIM DSND TO 2200 FT MSL SO WE COULD PRACTICE NDB NAV BELOW CAK AIRSPACE. WHILE EXPLAINING THE USE OF THE NDB AND HOW TO TRACK A COURSE, THE ACFT CLBED TO 2500 FT MSL. WE WERE STILL NE OF THE NDB (TRACKING THE 250 DEG MAGNETIC BEARING TO THE STATION). AS SOON AS I NOTICED THE ALT, I INITIATED AN IMMEDIATE DSCNT DOWN TO 2200 FT. I BELIEVE THAT WE MAY HAVE INADVERTENTLY ENTERED CAK'S AIRSPACE. NEXT TIME I WILL CALL UP CAK AND REQUEST ADVISORIES TO PREVENT THIS FROM HAPPENING AGAIN.

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.