AN SMT LANDED WITHOUT CLRNC.

Narrative

THE AIRPLANE OWNER/SALESMAN WAS DEMONSTRATING THE AIRPLANE TO MY COMPANY FOR POTENTIAL SALE. HE WAS IN THE R SEAT; AND I WAS IN THE L. I FLEW THE AIRPLANE AS WELL AS HANDLED THE RADIO'S; ALSO TESTING THE SYSTEMS AND AVIONICS TO INSURE THAT THEY WERE WORKING AND NOT IN NEED OF REPAIR. THE OWNER 'COACHED' ME AS TO PWR SETTINGS AND OTHER OPERATIONAL PROCS. APCH CLRED US FOR A VISUAL TO RWY 8R; THEN HANDED US OFF TO TWR. I SET THE COM RADIO TO WHAT I THOUGHT WAS TWR FREQ; AND BROADCAST MY POS WHILE I CONFIGURED THE AIRPLANE FOR LNDG AND COUPLED THE FLT DIRECTOR AND AUTOPLT TO THE ILS TO CHK IT'S OP. THE OWNER STATED THAT HE THOUGHT WE WERE 'REALLY HIGH;' AND WE ADDED MORE FLAPS AND BUSIED OURSELVES WITH LNDG THE AIRPLANE. WE BOTH THOUGHT WE HAD HEARD A LNDG CLRNC AFTER MY XMISSION. AFTER LNDG; WE TOLD THE TWR OF OUR INTENTIONS AS WE TURNED OFF THE RWY; AND; HEARING NOTHING; CHANGED OVER TO THE GND FREQ. THE GND CTLR TOLD US WE HAD LANDED WITHOUT CLRNC AND THAT TWR HAD WANTED US TO EXPEDITE CLRING THE RWY AND HAD TO SEND THE ACFT BEHIND US AROUND BECAUSE WE DIDN'T RESPOND TO HIS XMISSION. THE OTHER PLT AND I COULDN'T BELIEVE IT; BUT AS WE EXAMINED OUR RADIO'S; IT BECAME APPARENT THAT THE TWR FREQ WAS MISSED BY ONE DIGIT. IN THE BUSY TIME DURING THE FREQ CHANGE; I HAD APPARENTLY BROADCAST ON THE WRONG FREQ AND READ BACK A LNDG CLRNC I HADN'T HEARD! UPON LNDG WE CALLED THE TWR AND EXPLAINED THE MIX UP. OBSERVATIONS: I WAS HANDLING TOO MANY TASKS IN FLYING; HANDLING THE RADIO'S; AND CHKING OUT THE AIRPLANE'S MANY SYSTEMS. I SHOULD HAVE LET THE OWNER-PLT HANDLE THE COM AND NAV RADIOS. WHEN THINGS GOT BUSY; A MISTAKE WAS MADE BECAUSE OF DIVERTED ATTN AND ASSUMPTIONS ABOUT COMS.