FLC OF A SUPER KING AIR BE20 BROKE OUT OF OVCST ON AN ILS APCH TO SEE A TFC WATCH C172 IN A STEEPED BANK R TURN IN RESPONSE TO TWR CTLR'S INSTRUCTIONS TO AVOID THE RPTR ON AN ILS APCH.

Narrative

ON THE DATE IN QUESTION; THE CONFLICT STARTED WHEN CMH APCH TURNED US OVER TO OSU TWR. WE WERE ESTABLISHED IN DSCNT ON THE ILS RWY 9R AT OSU. WHEN I SWITCHED TO THE TWR FREQ; I CAUGHT THE TAIL END OF A XMISSION THAT ENDED 'I HAVE A KING AIR ON A 4 MI FINAL.' I THEN CHKED ON WITH TWR FREQ; AND HE ADVISED ME THAT I HAD TFC 11 O'CLOCK (I MISSED THE DISTANCE) AT 2000 FT. WE WERE DSNDING THROUGH 2200 FT; SOLID IMC. I DOUBT IF THE TWR READ THE ALT TO ME CORRECTLY. BEFORE I COULD OBTAIN CLARIFICATION; THE TWR CTLR ADVISED THE OTHER TARGET THAT HE SUGGESTED AN IMMEDIATE R-HAND 360 DEG TURN. ALMOST SIMULTANEOUSLY; WE BROKE OUT. WE SAW THE OTHER ACFT IN AN EXTREMELY STEEP R BANK. THE CONFLICT WAS OVER AS SOON AS WE SAW THE OTHER ACFT. THE OTHER ACFT WAS FOLLOWING I-270 ON A TFC SURVEY MISSION. MY THOUGHTS ON THE OCCURRENCE: OSU TWR IS NOTORIOUS FOR NOT UPDATING THE WX. THE ATIS CALLED A 1600 FT OVCST. IT WAS IN FACT 1100 FT OVCST. OSU TWR WAS NONCHALANT WITH THE SIT. THE SIT COULD HAVE BEEN DEALT WITH EARLIER. AS I SAID; AS SOON AS I CHKED ON; THE CTLR KNEW WE WERE OUT THERE. 91.155 SAYS YOU MUST BE 500 FT BELOW THE CLOUDS IN CLASS D. AT THE SPDS WE FLY ILS; THAT WOULD GIVE US ALMOST A FULL MIN TO IDENT A TARGET AFTER BREAKING OUT. THE SURVEY PLT MAY HAVE RELIED ON THE ATIS TOO MUCH. ACCORDING TO THE ATIS; HE WAS 500 FT BELOW THE CLOUDS. OUR TCASII DIDN'T ALERT US; PERHAPS THE OTHER ACFT XPONDER WAS INOP OR OFF.