B757 CONDUCTING THE NEW CONTINUOUS DSND APCH; CDA; TO SDF IS UNCERTAIN IF LNDG CLRNC WAS RECEIVED.

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IT WAS THE FIRST NIGHT FOR A NEW PROC CALLED CDA (CONTINUOUS DSND APCH) FOR A LIMITED AMOUNT OF PLANES FROM THE WEST COAST FLYING INTO LOUISVILLE; KY. IT IS A PROGRAMMED ARR PROC REQUIRING EXACT COMPLIANCE ALL THE WAY TO VIRTUALLY TOUCHDOWN. FLAP SETTING; GEAR DOWN; AND ALL SPDS HAVE A PRECISE TIME TO BE INITIATED; OR THE ARR PROC DOES NOT FLOW SMOOTHLY. BOTH THE FO AND MYSELF WERE INTENSELY FOCUSED ON COMPLYING WITH ALL THE PROCS THAT WHEN APCH SENT US TO THE TWR; ACFT PROCS HAD TO BE ACCOMPLISHED AT EXACTLY THE SAME TIME. THE FO TRIED TO INITIATE COM BUT TWR WAS TALKING TO SOMEONE ELSE. WE CONTINUED TO BE VERY BUSY AND I CONTINUED WITH THE APCH. UPON ROLLOUT THE TWR SAID 'ACR X; ARE YOU WITH ME' AND THEN CLRED US TO THE RAMP. AT THAT TIME MY FO WONDERED IF WE HAD LNDG CLRNC AND I SAID I CAN'T REMEMBER ONE WAY OR THE OTHER. THE RESULT IS THAT WE MAY HAVE LANDED WITHOUT CLRNC. THERE WAS NO ATTEMPT BY TWR TO CONTACT US ON FINAL EVEN THOUGH WE WERE ON FREQ. WE ATTRIBUTE THIS PROB TO THE NEW AND SOMEWHAT HEAVIER WORKLOAD THAT REQUIRED A LOT OF FOCUS IN A SHORT PERIOD OF TIME. THAT COMBINED WITH INITIAL COM CONTACT PROBS MAY HAVE LED US TO LAND WITHOUT CLRNC. WE JUST DON'T KNOW AS SOMETIMES YOU GET CLRED BUT ARE NOT SURE AND USUALLY ASK AGAIN. THIS TIME WE DID NOT ASK; AS WE WERE SO FOCUSED ON THE NEW PROC.