A C210L PLT; ON APCH TO RWY 28L AT PIT; ENTERED INTO THE RWY 28C APCH PATH.

Narrative

I WAS ON THE INST APCH TO RWY 28L AT PITTSBURG INTL ARPT (PIT). WHILE OUTSIDE THE IAF I WAS LINED UP ON THE LOC BUT; AFTER XING THE IAF I BEGAN TO DRIFT OFF CTR TO THE R TOWARD RWY 28C AS I FLEW DOWN THE LOC TO DECISION HT. I MISSED THE APCH ON 2 OCCASIONS TO RWY 28L AND WAS DIRECTED TO GO AROUND BY THE TWR BOTH TIMES; ALTHOUGH I COULD HAVE LANDED ON THE 2ND APCH. ON THE THIRD APCH; I WAS DIRECTED TO USE RWY 28R AND GIVEN AN EXTENDED DOWNWIND TO INTERCEPT THE LOC. THE APCH AND LNDG WERE SUCCESSFUL AND ACCURATE AND WERE COMPLETED WITHOUT INCIDENT. ARRS AT THE TIME WERE USING RWYS 28L AND R WHILE DEPS WERE USING RWY 28C. IT HAS ALWAYS BEEN MY PRACTICE TO MANUALLY FLY THE APCH RATHER THAN HAVING THE AUTOPLT CTL THE ACFT. I WAS UNFAMILIAR WITH THE ARPT ENVIRONMENT. I WAS NOT ABLE TO RECOGNIZE WHERE THE THRESHOLDS OF RWY 28L WAS LOCATED IN RELATION TO RWY 28C. THE LOW IFR CONDITIONS (1 1/2 MI VISIBILITY; 1000 FT OVCST; 600 FT BROKEN; FEW CLOUDS 300 FT AND RVR 6000 FT); COUPLED WITH THE HIGH TFC VOLUME AND KEEPING MY SPD UP TO SEQUENCE WITH THE COMMERCIAL JET TFC; JUST MADE THINGS HAPPEN FASTER WITH LITTLE ROOM FOR CORRECTION. THE CLOSE PROX OF RWYS 28L AND 28C MADE IT EASY TO BE CONFUSED AFTER BREAKING OUT IN LOW IFR. THE DISTR OF TUNING IN TWR FREQ AFTER XING THE IAF RATHER THAN HAVING IT TUNED IN AHEAD OF TIME. (I ACTUALLY HAD THE WRONG FREQ TUNED) WAS DIFFICULT. IT SEEMED LIKE I TUNED DIFFERENT FREQS ON EACH GAR BOTH FOR TWR AND DEP. THE PROB ON THE FIRST 2 APCHS WAS DISCOVERED AFTER I BROKE OUT AND HAD A VISUAL ON THE RWY; NOTING THAT IT IN FACT WAS RWY 28C RATHER THAN RWY 28L; AND I WAS OFF CTR TO THE R. IN THE FUTURE; I WILL SPEND MORE TIME UNDERSTANDING THE ARPT ENVIRONMENT AND PARTICULARLY BE AWARE OF RWY RELATIONSHIPS WHERE THERE ARE 3 PARALLEL RWYS NOTING THE RELATIONSHIP OF EACH RWY TO THE OTHER. ON LOW IFR APCHS AT HIGH TFC ARPTS THAT I'M UNFAMILIAR WITH; I NEED TO LET THE AUTOPLT HELP GUIDE THE ACFT BUT STILL MONITOR THE APCH AS IF I WAS MANUALLY FLYING AS I DID ON THE THIRD APCH TO RWY 28R. I NEED TO HAVE THE PROPER FREQS TUNED IN FOR APCH AND TWR SO THAT I WON'T BE DISTRACTED WHILE INSIDE THE IAF; ESPECIALLY IN LOW IFR APCHS. THIS WOULD AFFORD MORE FOCUS ON THE GAUGES AND GUIDING THE ACFT DOWN THE LOC.