An air carrier medium large transport on the converging ILS runway 12 approach made a missed approach at the decision ht and was told to fly a northeast heading and climb to 2000 ft. Aircraft was then vectored for an ILS approach to runway 19 and after landing was told to contact approach control via phone. Supervisor controller told reporter that there was a possible controller error during the missed approach. Reporter felt ATC handling was good and saw no other traffic during his go around or on subsequent approach.

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Attributes
ACN	359752
Time
Date	199702
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : iad
State Reference	VA
Altitude	msl bound lower : 2000 msl bound upper : 2000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : iad
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	descent : approach landing : go around landing : missed approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 8000 flight time type : 3000
ASRS Report	359752
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 10000 flight time type : 600
ASRS Report	359762
Events
Anomaly	conflict : airborne less severe inflight encounter : weather non adherence : required legal separation
Independent Detector	atc equipment other atc equipment : unspecified other controllera
Resolutory Action	controller : issued new clearance none taken : detected after the fact
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

Flying converging ILS to runway 12 dulles. At decision ht told tower we were missed approach. He told us to fly a northeast heading climb to 2000 ft. Approach and tower did an excellent job, we were back on approach to ILS runway 19 very quickly. Approach asked to give them a phone call. They stated we came close to another aircraft on the missed, he was investigating possible controller error. Converging approach usually works great. In this situation WX was rapidly deteriorating and it doesn't work so well below minimums. No complaints from crew as controllers did good job working us over to different landing runway.

Original NASA ASRS Text

Title: AN ACR MLG ON THE CONVERGING ILS RWY 12 APCH MADE A MISSED APCH AT THE DECISION HT AND WAS TOLD TO FLY A NE HEADING AND CLB TO 2000 FT. ACFT WAS THEN VECTORED FOR AN ILS APCH TO RWY 19 AND AFTER LNDG WAS TOLD TO CONTACT APCH CTL VIA PHONE. SUPVR CTLR TOLD RPTR THAT THERE WAS A POSSIBLE CTLR ERROR DURING THE MISSED APCH. RPTR FELT ATC HANDLING WAS GOOD AND SAW NO OTHER TFC DURING HIS GAR OR ON SUBSEQUENT APCH.

Narrative: FLYING CONVERGING ILS TO RWY 12 DULLES. AT DECISION HT TOLD TWR WE WERE MISSED APCH. HE TOLD US TO FLY A NE HEADING CLB TO 2000 FT. APCH AND TWR DID AN EXCELLENT JOB, WE WERE BACK ON APCH TO ILS RWY 19 VERY QUICKLY. APCH ASKED TO GIVE THEM A PHONE CALL. THEY STATED WE CAME CLOSE TO ANOTHER ACFT ON THE MISSED, HE WAS INVESTIGATING POSSIBLE CTLR ERROR. CONVERGING APCH USUALLY WORKS GREAT. IN THIS SIT WX WAS RAPIDLY DETERIORATING AND IT DOESN'T WORK SO WELL BELOW MINIMUMS. NO COMPLAINTS FROM CREW AS CTLRS DID GOOD JOB WORKING US OVER TO DIFFERENT LNDG RWY.

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.