Narrative:

Reported approximately 2-3 mi final for runway 12, when I was actually on final for runway 21. Was cleared to land on runway 12 and actually landed on runway 21. I was returning from a flight from btm to bzn. I was at low altitude, 50-200 ft AGL and in position for a landing on runway 21. Called in for a 2-3 mi final and idented my position straight in for runway 12 instead of runway 21. Landed and was advised that I had landed without clearance. No traffic conflict. Just a good example of dyslexia.

Google
 

Original NASA ASRS Text

Title: SMA PLT LANDED ON THE REVERSE RWY AT BZN.

Narrative: RPTED APPROX 2-3 MI FINAL FOR RWY 12, WHEN I WAS ACTUALLY ON FINAL FOR RWY 21. WAS CLRED TO LAND ON RWY 12 AND ACTUALLY LANDED ON RWY 21. I WAS RETURNING FROM A FLT FROM BTM TO BZN. I WAS AT LOW ALT, 50-200 FT AGL AND IN POS FOR A LNDG ON RWY 21. CALLED IN FOR A 2-3 MI FINAL AND IDENTED MY POS STRAIGHT IN FOR RWY 12 INSTEAD OF RWY 21. LANDED AND WAS ADVISED THAT I HAD LANDED WITHOUT CLRNC. NO TFC CONFLICT. JUST A GOOD EXAMPLE OF DYSLEXIA.

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.