BE33 LANDED AT JEF WITHOUT CONTACTING THE TWR.

Narrative

WHEN ADVISED BY CTR TO EXPECT ILS RWY 31 APCH; APPROPRIATE FREQS WERE SET PER APCH PLATE. AFTER CLRED FOR APCH; PROCEEDED. CTR ADVISED CHANGE TO TWR FREQ. I THOUGHT SHE SAID 125.1; WHICH IS WHAT I HAD SET. I BELIEVE I REPEATED THAT BACK TO HER; TO WHICH SHE RESPONDED AFFIRMATIVE. I CALLED TWR. WHEN I RECEIVED NO RESPONSE; I MISTAKENLY ASSUMED THE TWR WAS CLOSED. I THEN XMITTED 'JEFFERSON CITY TFC' ADVISORIES AS TO MY INTENTIONS/POS. AFTER LNDG; I WAS REQUESTED TO CALL THE TWR VIA THE FATHER OF THE EMPLOYEE THAT WAS WITH ME. CONTRIBUTING FACTORS: ON A PRIOR FLT TO MHK; I COULD NOT REACH THE TWR. I WENT BACK TO CTR; AND AFTER SOME DELAY; I WAS TOLD 'TWR IS CLOSED.' THIS FLT ORIGINATED AT MHK; AND I THINK THIS CONTRIBUTED TO MY IMPRESSION THAT THE TWR WAS CLOSED. ALSO; THE EMPLOYEE HAD TOLD ME SHE HAD FLOWN IN IMC BEFORE; BUT SHE WAS SCARED DURING THE DSCNT; ASKING IF WE WERE GOING TO DIE. I WAS ANXIOUS TO GET HER ON THE GND WITHOUT DELAY. PREVENTION: PUT OPERATING HRS ON TERMINAL PROCS IF THE HRS ARE REPETITIVE.