Narrative:

Did not receive/hear landing clearance before landing. I was distracting myself in the cockpit by conversing with passenger and did not switch radios, but I did put in the frequency. I discovered this on short final 10-15 ft in air. I switched radios and called the tower after touchdown. Tower did not say anything and I didn't ask. Tower cleared me for normal taxiway turnoff and then to ground. No excuses. I should not have been talking with passenger and should have been concentrating on the job at hand. Remember in future.

Google
 

Original NASA ASRS Text

Title: AN SMT LANDS WITHOUT CLRNC AT SFO.

Narrative: DID NOT RECEIVE/HEAR LNDG CLRNC BEFORE LNDG. I WAS DISTRACTING MYSELF IN THE COCKPIT BY CONVERSING WITH PAX AND DID NOT SWITCH RADIOS, BUT I DID PUT IN THE FREQ. I DISCOVERED THIS ON SHORT FINAL 10-15 FT IN AIR. I SWITCHED RADIOS AND CALLED THE TWR AFTER TOUCHDOWN. TWR DID NOT SAY ANYTHING AND I DIDN'T ASK. TWR CLRED ME FOR NORMAL TXWY TURNOFF AND THEN TO GND. NO EXCUSES. I SHOULD NOT HAVE BEEN TALKING WITH PAX AND SHOULD HAVE BEEN CONCENTRATING ON THE JOB AT HAND. REMEMBER IN FUTURE.

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.