SMA ON IFR FLT PLAN HAS NMAC WITH OPPOSITE DIRECTION TFC.

Narrative

I WAS ON AN INST FLT PLAN FROM CADILLAC; MI (CAD). I HAD ADVISED ZMP THAT I HAD LOST 1 COMS RADIO SHORTLY AFTER DEP. THE FLT WAS UNEVENTFUL UNTIL AFTER HDOF BY FLINT (FNT) APCH TO DETROIT (DTW). DTW HAD VECTORED MY ACFT FOR A VISUAL APCH TO THE LOC/DME BACK COURSE RWY 27L AT OAKLAND-PONTIAC ARPT (PTK). WX CONDITIONS PRESENTED HAZE WHICH RESTR VISIBILITY TO 3-4 MI AT BEST. AS DTW CLRED ME FOR THE APCH AND DIRECTED ME TO PTK TWR; A SINGLE ENG (LOW WING; WHITE/LIGHT BLUE STRIPES) ACFT APPEARED AT MY 12 O'CLOCK POS; SAME ALT; OPPOSITE DIRECTION. THE ACFT PASSED OFF MY L SIDE WITHIN APPROX 500 FT AS I TURNED AWAY. THE OTHER ACFT DID NOT APPEAR TO TAKE ANY EVASIVE ACTION DURING THE EVENT. I MADE A R TURN AWAY FROM TFC AS DTW WAS GIVING ME CLRNC FOR THE APCH. DTW HAD FURTHER ADVISED ME OF FAST TFC NW OF MY POS WHICH WOULD FOLLOW ME. I ASKED DTW IF THEY HAD SEEN THE OPPOSITE (NEAR MISS) TFC. NO REPLY. I SWITCHED TO PTK TWR FREQ. IT WAS VERY BUSY. I ANNOUNCED MYSELF 2; MAYBE 3 TIMES WITH NO RESPONSE FROM PTK TWR. I BEGAN TO THINK THAT I MAY BE HAVING FURTHER RADIO PROBS. KNOWING THAT TFC WAS TIGHT AND FASTER THAN ME; AND THAT I HAD DEVIATED TO AVOID THE OTHER ACFT AND WAS UNABLE TO COMMUNICATE WITH THE TWR; I OPTED TO 'GET OUT OF THE WAY' DOING A 360 DEG TURN S OF THE APCH COURSE. CONSIDERING THE UNNERVING MISS; LACK OF COM (NO CLRNC TO LAND HAD BEEN GIVEN); BUSY FREQ; FAST TFC TO THE N; I THOUGHT CONTINUING THE APCH WOULD CREATE THE WORST OF THE HAZARDOUS SITS THAT I ENVISIONED AT THAT MOMENT. PTK TWR CALLED ME UP TO CLR ME TO LAND AND BECAME UNDERSTANDABLY IRRITATED ABOUT MY DEV. I CALLED THE TWR AFTER ARRIVING HOME TO INQUIRE ABOUT THE EVENT. THE PTK SUPVR ADVISED ME THAT HE HAD BEEN UNAWARE OF THE ACFT WHICH I CALLED A NEAR MISS. HE INDICATED THAT HE WAS CONSUMED AT THAT TIME WITH HANDLING THE RELATIVELY HVY TFC THEN ARRIVING AT PTK. HE ADVISED ME TO CALL THE SUPVR AT DTW APCH. I DID. THE DTW SUPVR SAID THAT HE WAS AWARE OF THE PROB THAT I HAD DURING MY APCH TO PONTIAC. HE STATED FURTHER THAT THE CTLR WHO WAS HANDLING ME AT THE TIME IN QUESTION WAS; IN FACT; AWARE OF THE OPPOSITE DIRECTION TFC. THAT CTLR; HE SAID; HAD BEEN TOO BUSY TO CALL THE TFC FOR ME. IN ADDITION; THE DTW SUPVR INDICATED THAT I WAS OUTSIDE THE ATA AT THE TIME OF THE EVENT. APPARENTLY THAT HAD SOMETHING TO DO WITH THE CTLR'S OBLIGATION TO ALERT ME TO THE OPPOSITE TFC. I BELIEVE THAT I WAS SO CLOSE TO THE ATA THAT THE OTHER ACFT SHOULD HAVE BEEN CALLED FOR ME. IN FACT; I BELIEVE THE OTHER TFC WAS CLOSE ENOUGH TO ME THAT DTW SHOULD HAVE REQUIRED ME TO DEVIATE SINCE DTW WAS NOT IN CONTACT WITH THE OPPOSITE TFC. AS I TRY TO RECALL MY POS VISUALLY; I BELIEVE THAT I WAS VERY CLOSE TO THE ATA (IF IT REALLY MATTERS).