Narrative:

Aircraft X, BE58, was inbound to mtp airport at 5000 ft. Aircraft X was instructed to proceed to sey VOR, the initial approach fix for the GPS runway 24 approach at mtp. Aircraft Y, P28A, was northeast of sey swbound. Aircraft X was instructed to cross sey at 3000 ft and cleared for the GPS runway 24 approach. Aircraft X requested to proceed to feksa, an intermediate fix on the GPS approach. The pilot was then told to proceed to feksa and cleared for the approach. I expected the aircraft to proceed over feksa, then straight-in to mtp airport. The aircraft did an unexpected turn in the holding pattern at feksa which was northeast of the fix. The turn to the northeast put the 2 aircraft into conflict with each other and separation was lost. Supplemental information from acn 617808: this incident occurred while I was on an instrument approach, during a procedure turn. It was marginal VFR/IFR. I was cleared for an approach. There was confusion between myself and controller as to where to begin the approach. I specifically told him that a procedure turn would be required. While in a procedure turn, my TCASII warned me of an imminent collision, which required evasive diving to avoid a target that passed very close to my aircraft. I had thought that the airspace was free of other traffic while on the approach. I believe that between the confusion of this being a relatively new approach and a controller overload, a very close near miss occurred.

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Original NASA ASRS Text

Title: PROVIDENCE CTLR EXPERIENCED LOSS OF SEPARATION WHEN A BE58 MAKES UNEXPECTED TURN IN HOLDING PATTERN DURING GPS APCH TO MTP, CONFLICTING WITH ANOTHER IFR ACFT ON VECTOR TO FINAL.

Narrative: ACFT X, BE58, WAS INBOUND TO MTP ARPT AT 5000 FT. ACFT X WAS INSTRUCTED TO PROCEED TO SEY VOR, THE INITIAL APCH FIX FOR THE GPS RWY 24 APCH AT MTP. ACFT Y, P28A, WAS NE OF SEY SWBOUND. ACFT X WAS INSTRUCTED TO CROSS SEY AT 3000 FT AND CLRED FOR THE GPS RWY 24 APCH. ACFT X REQUESTED TO PROCEED TO FEKSA, AN INTERMEDIATE FIX ON THE GPS APCH. THE PLT WAS THEN TOLD TO PROCEED TO FEKSA AND CLRED FOR THE APCH. I EXPECTED THE ACFT TO PROCEED OVER FEKSA, THEN STRAIGHT-IN TO MTP ARPT. THE ACFT DID AN UNEXPECTED TURN IN THE HOLDING PATTERN AT FEKSA WHICH WAS NE OF THE FIX. THE TURN TO THE NE PUT THE 2 ACFT INTO CONFLICT WITH EACH OTHER AND SEPARATION WAS LOST. SUPPLEMENTAL INFO FROM ACN 617808: THIS INCIDENT OCCURRED WHILE I WAS ON AN INST APCH, DURING A PROC TURN. IT WAS MARGINAL VFR/IFR. I WAS CLRED FOR AN APCH. THERE WAS CONFUSION BTWN MYSELF AND CTLR AS TO WHERE TO BEGIN THE APCH. I SPECIFICALLY TOLD HIM THAT A PROC TURN WOULD BE REQUIRED. WHILE IN A PROC TURN, MY TCASII WARNED ME OF AN IMMINENT COLLISION, WHICH REQUIRED EVASIVE DIVING TO AVOID A TARGET THAT PASSED VERY CLOSE TO MY ACFT. I HAD THOUGHT THAT THE AIRSPACE WAS FREE OF OTHER TFC WHILE ON THE APCH. I BELIEVE THAT BTWN THE CONFUSION OF THIS BEING A RELATIVELY NEW APCH AND A CTLR OVERLOAD, A VERY CLOSE NEAR MISS OCCURRED.

Data retrieved from NASA's ASRS site as of July 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.