Narrative:

I was talking to approach control (austin). I was cleared for the visual approach to runway 17L, but never told to go to tower. Just as I was turing to final, my HSI tumbled, distracting me so that I did not notice I was not on tower frequency. As a result, I landed wihtout permission. I discovered the error when I went to switch to ground. I called the tower frequency to apologize, and the tower told me to go to ground and taxi to parking.

Google
 

Original NASA ASRS Text

Title: A46 PLT LNDG AUS FAILED TO OBTAIN A LNDG CLRNC.

Narrative: I WAS TALKING TO APCH CTL (AUSTIN). I WAS CLRED FOR THE VISUAL APCH TO RWY 17L, BUT NEVER TOLD TO GO TO TWR. JUST AS I WAS TURING TO FINAL, MY HSI TUMBLED, DISTRACTING ME SO THAT I DID NOT NOTICE I WAS NOT ON TWR FREQ. AS A RESULT, I LANDED WIHTOUT PERMISSION. I DISCOVERED THE ERROR WHEN I WENT TO SWITCH TO GND. I CALLED THE TWR FREQ TO APOLOGIZE, AND THE TWR TOLD ME TO GO TO GND AND TAXI TO PARKING.

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.