Narrative:

While inbound to iso I received radar following by iso approach. My heading was approximately 220 degrees inbound iso VOR. On 2 occasions iso approach asked if I had visual contact with an small aircraft 5 mi ahead of me. Each time I answered, 'negative contact due to the sun.' I was told report passing iso VOR, which I did. I was then advised to change frequency to iso tower. As I was resetting to tower frequency, I heard a loud, whining sound from my right and a moment later a twin engine jet passed my nose at approximately 10-15 degree bank to the right. The other aircraft was at the same altitude as I was, approximately 1500', and about 300-500' away. Just seconds afterwards I reported to iso tower 'turning left to heading 180 degrees.' after I had accomplished the turn. I reported to iso tower that I was on a heading of 180 degrees, due to a close midair collision with a jet that passed me, far too closely. I kept that heading for approximately 2 mins until I was cleared to land on runway 23. I don't know what went wrong, as 1 second before the incident I enjoyed radar following, on which screen there must have been 2 aircraft on a collision course. Probable causes: poor visibility due to position of the sun relative to the tracks of both aircraft, possible work overload on controllers at iso approach and controller training at iso (not sure of this). Corrective actions: handoff from approach to tower sooner, eg, when within the ATC; use experienced controllers when traffic is heavy.

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Original NASA ASRS Text

Title: CLOSE PROX ACR-MLG GA-SMA.

Narrative: WHILE INBND TO ISO I RECEIVED RADAR FOLLOWING BY ISO APCH. MY HDG WAS APPROX 220 DEGS INBND ISO VOR. ON 2 OCCASIONS ISO APCH ASKED IF I HAD VISUAL CONTACT WITH AN SMA 5 MI AHEAD OF ME. EACH TIME I ANSWERED, 'NEGATIVE CONTACT DUE TO THE SUN.' I WAS TOLD RPT PASSING ISO VOR, WHICH I DID. I WAS THEN ADVISED TO CHANGE FREQ TO ISO TWR. AS I WAS RESETTING TO TWR FREQ, I HEARD A LOUD, WHINING SOUND FROM MY RIGHT AND A MOMENT LATER A TWIN ENG JET PASSED MY NOSE AT APPROX 10-15 DEG BANK TO THE RIGHT. THE OTHER ACFT WAS AT THE SAME ALT AS I WAS, APPROX 1500', AND ABOUT 300-500' AWAY. JUST SECS AFTERWARDS I RPTED TO ISO TWR 'TURNING LEFT TO HDG 180 DEGS.' AFTER I HAD ACCOMPLISHED THE TURN. I RPTED TO ISO TWR THAT I WAS ON A HDG OF 180 DEGS, DUE TO A CLOSE MIDAIR COLLISION WITH A JET THAT PASSED ME, FAR TOO CLOSELY. I KEPT THAT HDG FOR APPROX 2 MINS UNTIL I WAS CLRED TO LAND ON RWY 23. I DON'T KNOW WHAT WENT WRONG, AS 1 SEC BEFORE THE INCIDENT I ENJOYED RADAR FOLLOWING, ON WHICH SCREEN THERE MUST HAVE BEEN 2 ACFT ON A COLLISION COURSE. PROBABLE CAUSES: POOR VISIBILITY DUE TO POS OF THE SUN RELATIVE TO THE TRACKS OF BOTH ACFT, POSSIBLE WORK OVERLOAD ON CTLRS AT ISO APCH AND CTLR TRNING AT ISO (NOT SURE OF THIS). CORRECTIVE ACTIONS: HDOF FROM APCH TO TWR SOONER, EG, WHEN WITHIN THE ATC; USE EXPERIENCED CTLRS WHEN TFC IS HEAVY.

Data retrieved from NASA's ASRS site as of August 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.