ACR USES LOST COM PROC WHEN IT EXPERIENCES LOSS OF RADIO CONTACT ON APCH.

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ON FEB/XX/93 I WAS PIC OF FLT FROM MKE-CMH. THE FLT WAS ROUTINE UNTIL ABOUT 14 NM FROM CMH. WE WERE N OF LOC ON AN ASSIGNED HDG OF 180 DEGS DSNDING TO 4000 FT. (BASE LEG ENTRY FOR ILS 10R APCH.) WE WERE IMC/ICING CONDITIONS. APCH FREQ BECAME VERY QUIET. FO ASKED FOR A RADIO CHK. SILENCE. HE ASKED AGAIN. NOTHING. HE SWITCHED TO THE OTHER APCH FREQ; THEN TWR AND FINALLY 121.5. AGAIN; SILENCE. WE TRIED BOTH BOOM MIKES AND BOTH HAND MIKES. WE ALSO TRIED BOTH RADIOS TO NO AVAIL. I DOUBLECHKED MSA (3100 FT). I STAYED AT LAST CLRED ALT (4000 FT). FO SQUAWKED 7600 AND STARTED BROADCASTING OUR INTENTIONS ON 121.5. WE ANNOUNCED AND FLEW A BOX PATTERN IN LIEU OF A PROC TURN. WE CONTINUED TO BROADCAST EVERY TURN DSCNT AND INTENTION ON 121.5. I FLEW A 12 MI FINAL AND INTERCEPTED THE GS FROM 4000 FT. I BROKE OUT ABOUT 1200 FT AND LANDED. I TAXIED TO THE GATE AND SHUT DOWN THE ENGS. AFTER MAINT WAS THROUGH WITH MY INPUT I CALLED THE APCH FACILITY. THEY WERE HEARING OUR XMISSIONS AND SAID WE BLOCKED EACH FREQ WE TUNED INTO. THERE WAS A XMISSION PROB WITH OUR RADIOS. THE FO WAS TO BE COMMENDED FOR HIS COCKPIT RESOURCE MGMNT SKILLS. HE HAD VALUABLE INPUT YET LEFT COMMAND TO ME. HE REMAINED CALM AND WAS AN EXTREME ASSET TO THE SIT.