Medium large transport flight crew on base for 18R at dfw lost contact with approach controller, flew through centerline of 3 runways before regaining contact and a vector for intercepting a runway for landing.

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Attributes
ACN	124371
Time
Date	198910
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : dfw
State Reference	TX
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : dfw
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	descent : approach landing other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : instrument pilot : commercial
Experience	flight time last 90 days : 200 flight time total : 8000 flight time type : 1000
ASRS Report	124371
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 200 flight time total : 4000
ASRS Report	124377
Events
Anomaly	conflict : airborne less severe other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	controller : issued new clearance none taken : anomaly accepted
Consequence	faa : reviewed incident with flight crew Other
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

We were being vectored for an ILS to 18R at dfw regional airport. We checked in on frequency 132.1 and acknowledged instructions to turn a base leg, heading 090 degree and 3000'. We heard no other instructions. When we could see we were going to go through the localizer, we made a call to approach control. There was no answer. As we knew if we kept heading east we would come in conflict with a parallel localizer, we called the tower. The tower gave us landing clearance which didn't make sense as we hadn't been given approach clearance and were not in visual contact with the airport. Immediately we tried approach control again, they acknowledged and instructed us to turn to heading 210 degree and descend to 2000'. At the same time we saw an aircraft on approach to the parallel runway, 17L. We followed the instructions and made a normal landing. We called approach control by phone. They said they made several calls while we were on base leg. We never received or acknowledged them.

Original NASA ASRS Text

Title: MLG FLT CREW ON BASE FOR 18R AT DFW LOST CONTACT WITH APCH CTLR, FLEW THROUGH CENTERLINE OF 3 RWYS BEFORE REGAINING CONTACT AND A VECTOR FOR INTERCEPTING A RWY FOR LNDG.

Narrative: WE WERE BEING VECTORED FOR AN ILS TO 18R AT DFW REGIONAL ARPT. WE CHECKED IN ON FREQ 132.1 AND ACKNOWLEDGED INSTRUCTIONS TO TURN A BASE LEG, HDG 090 DEG AND 3000'. WE HEARD NO OTHER INSTRUCTIONS. WHEN WE COULD SEE WE WERE GOING TO GO THROUGH THE LOC, WE MADE A CALL TO APCH CTL. THERE WAS NO ANSWER. AS WE KNEW IF WE KEPT HDG E WE WOULD COME IN CONFLICT WITH A PARALLEL LOC, WE CALLED THE TWR. THE TWR GAVE US LNDG CLRNC WHICH DIDN'T MAKE SENSE AS WE HADN'T BEEN GIVEN APCH CLRNC AND WERE NOT IN VISUAL CONTACT WITH THE ARPT. IMMEDIATELY WE TRIED APCH CTL AGAIN, THEY ACKNOWLEDGED AND INSTRUCTED US TO TURN TO HDG 210 DEG AND DSND TO 2000'. AT THE SAME TIME WE SAW AN ACFT ON APCH TO THE PARALLEL RWY, 17L. WE FOLLOWED THE INSTRUCTIONS AND MADE A NORMAL LNDG. WE CALLED APCH CTL BY PHONE. THEY SAID THEY MADE SEVERAL CALLS WHILE WE WERE ON BASE LEG. WE NEVER RECEIVED OR ACKNOWLEDGED THEM.

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.