DH8 FLC LANDS AT PIT WITHOUT OBTAINING LNDG CLRNC. RPTRS CITE FIRST TIME INTO ARPT AND SOME DISTRS.

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I WAS PNF; I WAS WORKING THE RADIOS. CLRED FOR VISUAL APCH AT ARPT I'VE NEVER BEEN TO; WAS TOLD TO SWITCH TO LCL CTLR ON R BASE. AS I WAS ANTICIPATING TAXI INSTRUCTIONS AFTER LNDG. I DID NOT FLIP UP TWR FREQ AFTER I SET IT IN STANDBY POS. LANDED WITHOUT CLRNC. CONTRIBUTING FACTORS WERE CHANGE IN ANTICIPATED RWY AT LAST MIN; NEW TO THE AIRPLANE; NEW TO PIT. DISCOVERED MY ERROR WHEN TWR DIDN'T CLR US OVER TO GND AFTER LNDG. I THEN CHKED MY LNDG LIGHTS (MEMORY AID FOR LNDG CLRNCS) -- WAS NOT ON. LATER I CALLED LCL CTLR. HE INFORMED ME THAT HE CLRED US FOR LNDG 2 OR 3 TIMES BUT GOT NO READBACK. ALSO SAID THERE WAS NO CONFLICTING TFC AT THE TIME. IN THE FUTURE I WILL BE MORE 'HEADS UP' WHEN GOING TO NEW ARPTS. MAYBE STUDY ALL TAXI OPTIONS PRIOR TO OPERATING AT UNFAMILIAR ARPTS! ALSO; PF CALLED FOR GEAR DOWN AFTER TWR FREQ WAS SET IN STANDBY AND PRIOR TO ME FLIPPING FREQ UP TO ACTIVE -- WAS DISTR AT A CRITICAL TIME OF FLYING THE ACFT. WE HAD OUR PRIORITIES STRAIGHT (AVIATE FIRST!) BUT FORGOT TO COMMUNICATE. (LAST ROUND TRIP OF 3 DAY TRIP=FATIGUE!)