AN ACR DC9 MAKES AN APCH TO THE WRONG RWY AT MCI AFTER THE CREW IS DISTRACTED WITH A PRESSURIZATION PROB. THE ATIS RWY DIFFERED FROM THE RWY ASSIGNED BY THE APCH CTLR.

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WHILE DSNDING INTO MCI; WE INCURRED A PRESSURIZATION PROB WHICH REQUIRED OUR ATTN. WE HAD ALREADY BRIEFED FOR THE RWY 19R APCH AS THE ATIS WAS SHOWING THAT WAS IN USE; AND THE RVR WAS QUITE LOW AT THE TIME. THE PRESSURIZATION PROB ESSENTIALLY TOOK THE FO OUT OF THE LOOP; AND WE MUST HAVE MISSED THE CTLR'S STATEMENT FOR RWY 19L. WE FIXED THE PRESSURIZATION PROB ON BASE LEG FOR THE VECTOR AND SUBSEQUENTLY CLRED FOR THE APCH. I HAD THE AUTOPLT FLY THE APCH AND HAD IT SET TO INTERCEPT RWY 19R ILS. THE GS CAPTURED; BUT THE LOC SHOWED FULL SCALE R DEFLECTION. WE BOTH COMMENTED THAT OBSERVATION AS THE AUTOPLT STARTED DOWN ON GLIDE PATH. AT THAT POINT; TWR SAID HE SHOWED US R OF THE RWY 19L LOC; AND WHEN WE QUESTIONED HIS COMMENT OF RWY 19L; HE HAD US ABANDON THE APCH AND CLB FROM OUR ALT OF 2800 FT MSL TO 3000 FT. WE TURNED E AND WERE RESEQUENCED FOR RWY 19L. THE SUBSEQUENT APCH/LNDG OCCURRED WITH NO FURTHER INCIDENCE. I ATTRIBUTE THIS LAPSE TO MY PREVIOUS NIGHT'S SLEEP. IT WAS OF POOR QUALITY DUE TO WAKING UP NUMEROUS TIMES. ALSO WE WERE SOMEWHAT PREOCCUPIED WITH THE PRESSURIZATION PROB; AND HAD I BEEN MORE WELL RESTED; I WOULD HAVE CAUGHT THE PROB SOONER. SUPPLEMENTAL INFO FROM ACN 393936: STATED WE WERE CLRED FOR THE 'R' NOT 'L.' DECIDED TOO LATE TO HAVE A STABILIZED APCH; SO EXECUTED MISSED APCH.