NMAC BTWN AN SMA UNDER POSITIVE CTL AND A VFR CHEROKEE SPIRALING DOWN THROUGH THE CLOUDS ON A VFR FLT PLAN. APCH CTLR ISSUES ADVISORY AND HDG AS PLT SEES INTRUDER.

Narrative

ABOVE PLT WAS BEING VECTORED FOR AN ILS APCH AT THE UCA; NY; ARPT. SAID ACFT WAS AT 3000 FT MSL AND IN AND OUT OF THE TOPS OF A BROKEN TO OVCST LAYER OF CLOUDS. GRIFFISS APCH CTL CALLED OUT VFR TFC AT 12 O'CLOCK POS AT 3500 FT. I WAS UNABLE TO SEE TFC BECAUSE OF IFR (IMC) FLT CONDITIONS. TFC WAS CALLED OUT AGAIN AT 1/2 MI AND DSNDING. CTLR THEN GAVE ME A VECTOR TO AVOID TFC JUST AS I BROKE OUT OF CLOUDS. TFC WAS SPIRALING THROUGH THE CLOUD LAYER RIGHT IN FRONT OF ME. IT WAS A VERY NEAR MISS AS I HAD TO TAKE IMMEDIATE EVASIVE ACTION. THIS TFC TURNED OUT TO BE A CHEROKEE FROM SLK; NUMBER XYZ; DSNDING VFR THROUGH A BROKEN TO SOLID CLOUD LAYER. I TALKED TO THE PLT AND HE STATED HE DID NOT SEE ME AND WAS ON A VFR FLT PLAN. AS FAR AS I CAN SEE THIS WAS A VERY POOR CHOICE OF THE VFR TFC AS HE HAD NO RADIO CONTACT WITH THE APCH CTLR. THE CTLR CAUGHT THE CHEROKEE JUST AS HE WAS LEAVING HIS ALT AND DID A GREAT JOB SAVING MY HIDE. YOU SHOULD BE HEARING FROM OTHER ACFT AS HE STATED TO ME THAT HE WOULD FILE A NASA RPT.