Narrative:

While in the vicinity of kerrville, tx, at 4500 ft I realized that I could not transmit on my radio. Before entering the san antonio arsa, near boerne, tx, I flew in circles at 3500 ft and attempted to contact san antonio approach on 127.1. I also attempted to contact san angelo FSS on 122.3. I could hear san antonio approach. I just could not transmit. At this point I squawked 7700 on the transponder, mode C, and proceeded into the area with the intention of landing at sat. While circling the aircraft I became lost within the arsa airspace. I also did not squawk 7600 on the transponder which would have indicated loss of radio communications. The airport activated emergency vehicles. I landed safely and spoke to the tower supervisor upon returning to the FBO. I was able to communication on a limited scale with the transponder and by me flashing my landing light. Corrective action: review and be familiar with all emergency procedures.

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Original NASA ASRS Text

Title: PLT OF SMA UNABLE TO COM WITH APCH CTLR SQUAWKED 7700 AND ENTERED ARSA AND LANDED AT SAT.

Narrative: WHILE IN THE VICINITY OF KERRVILLE, TX, AT 4500 FT I REALIZED THAT I COULD NOT XMIT ON MY RADIO. BEFORE ENTERING THE SAN ANTONIO ARSA, NEAR BOERNE, TX, I FLEW IN CIRCLES AT 3500 FT AND ATTEMPTED TO CONTACT SAN ANTONIO APCH ON 127.1. I ALSO ATTEMPTED TO CONTACT SAN ANGELO FSS ON 122.3. I COULD HEAR SAN ANTONIO APCH. I JUST COULD NOT XMIT. AT THIS POINT I SQUAWKED 7700 ON THE TRANSPONDER, MODE C, AND PROCEEDED INTO THE AREA WITH THE INTENTION OF LNDG AT SAT. WHILE CIRCLING THE ACFT I BECAME LOST WITHIN THE ARSA AIRSPACE. I ALSO DID NOT SQUAWK 7600 ON THE TRANSPONDER WHICH WOULD HAVE INDICATED LOSS OF RADIO COMS. THE ARPT ACTIVATED EMER VEHICLES. I LANDED SAFELY AND SPOKE TO THE TWR SUPVR UPON RETURNING TO THE FBO. I WAS ABLE TO COM ON A LIMITED SCALE WITH THE TRANSPONDER AND BY ME FLASHING MY LNDG LIGHT. CORRECTIVE ACTION: REVIEW AND BE FAMILIAR WITH ALL EMER PROCS.

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.