Multiple runway operation parallel runways air carrier X had conflict with air carrier Y on parallel runway. Visual approach in use. Evasive action taken.

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Attributes
ACN	260086
Time
Date	199312
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : den
State Reference	CO
Altitude	msl bound lower : 8000 msl bound upper : 8000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : den tower : sfo
Operator	common carrier : air carrier
Make Model Name	Medium Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	cruise other descent : approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
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 : 1000
ASRS Report	260086
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	conflict : airborne less severe non adherence : clearance other spatial deviation
Independent Detector	other controllera other flight crewa
Resolutory Action	controller : issued new clearance other
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 0 vertical : 500
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Air carrier X was being vectored for a visual approach to runway 26R from the northwest gate. The controller gave us vectors downwind, base across the runway 26L final then heading 260 degrees which blew us to the south of the runway 26L final approach course. He told us to spot an large transport for runway 26L, we were for runway 26R. I saw the large transport as we passed directly overhead of him. I called him in sight and was cleared for a visual approach to runway 26R. I told the first officer (PF) to steer right to get back on final for runway 26R and adjusted our speed to get behind the large transport who was now right next to us. We should have executed a go around because there was no way we could ensure adequate wake vortex separation. Had I not seen the large transport, we might have had a midair. The controller had vectored us onto the runway 26L course, we were for runway 26R. This situation is all too common at den. I called the approach control supervisor. Strangely enough, he was expecting my call. I should have filed an near midair collision too. Next time I definitely will do so.

Original NASA ASRS Text

Title: MULTIPLE RWY OP PARALLEL RWYS ACR X HAD CONFLICT WITH ACR Y ON PARALLEL RWY. VISUAL APCH IN USE. EVASIVE ACTION TAKEN.

Narrative: ACR X WAS BEING VECTORED FOR A VISUAL APCH TO RWY 26R FROM THE NW GATE. THE CTLR GAVE US VECTORS DOWNWIND, BASE ACROSS THE RWY 26L FINAL THEN HDG 260 DEGS WHICH BLEW US TO THE S OF THE RWY 26L FINAL APCH COURSE. HE TOLD US TO SPOT AN LGT FOR RWY 26L, WE WERE FOR RWY 26R. I SAW THE LGT AS WE PASSED DIRECTLY OVERHEAD OF HIM. I CALLED HIM IN SIGHT AND WAS CLRED FOR A VISUAL APCH TO RWY 26R. I TOLD THE FO (PF) TO STEER R TO GET BACK ON FINAL FOR RWY 26R AND ADJUSTED OUR SPD TO GET BEHIND THE LGT WHO WAS NOW RIGHT NEXT TO US. WE SHOULD HAVE EXECUTED A GAR BECAUSE THERE WAS NO WAY WE COULD ENSURE ADEQUATE WAKE VORTEX SEPARATION. HAD I NOT SEEN THE LGT, WE MIGHT HAVE HAD A MIDAIR. THE CTLR HAD VECTORED US ONTO THE RWY 26L COURSE, WE WERE FOR RWY 26R. THIS SIT IS ALL TOO COMMON AT DEN. I CALLED THE APCH CTL SUPVR. STRANGELY ENOUGH, HE WAS EXPECTING MY CALL. I SHOULD HAVE FILED AN NMAC TOO. NEXT TIME I DEFINITELY WILL DO SO.

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.