Near midair collision between an air carrier light transport turboprop descending and turning inbound for a visual, and flown through the localizer, and a DC9 on approach to the other parallel runway. Reporter took evasive action and approach controller turned them further back to join the runway localizer.

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Attributes
ACN	406923
Time
Date	199806
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : atl
State Reference	GA
Altitude	msl bound lower : 4300 msl bound upper : 4300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : atl tower : mke
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Navigation In Use	Other Other
Flight Phase	descent : approach descent other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 150 flight time total : 3400 flight time type : 30
ASRS Report	406923
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	conflict : nmac non adherence : clearance other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 500 vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

On vectors from the southeast to ILS runway 27L atl, heading north, crew acquired visual contact on traffic to follow. A turn and descent was initiated after being cleared for the visual runway 27L atl. Captain was PF. After scanning the instruments, looking outside, visual contact was lost with aircraft to follow. PNF contacted atl approach control and notified them that we needed vector, visual contact lost. They issued a left turn to 280 degrees. By this point we had flown through the runway 27L localizer and got a TA from north parallel traffic to runway 26R. PF initiated an evasive climb to avoid a DC9 air carrier Y aircraft. ATC issued a further left turn to 250 degrees to rejoin the localizer runway 27L. Atl approach switched us quickly to tower -- unable to advise atl of evasive maneuvers.

Original NASA ASRS Text

Title: NMAC BTWN AN ACR LTT TURBOPROP DSNDING AND TURNING INBOUND FOR A VISUAL, AND FLOWN THROUGH THE LOC, AND A DC9 ON APCH TO THE OTHER PARALLEL RWY. RPTR TOOK EVASIVE ACTION AND APCH CTLR TURNED THEM FURTHER BACK TO JOIN THE RWY LOC.

Narrative: ON VECTORS FROM THE SE TO ILS RWY 27L ATL, HDG N, CREW ACQUIRED VISUAL CONTACT ON TFC TO FOLLOW. A TURN AND DSCNT WAS INITIATED AFTER BEING CLRED FOR THE VISUAL RWY 27L ATL. CAPT WAS PF. AFTER SCANNING THE INSTS, LOOKING OUTSIDE, VISUAL CONTACT WAS LOST WITH ACFT TO FOLLOW. PNF CONTACTED ATL APCH CTL AND NOTIFIED THEM THAT WE NEEDED VECTOR, VISUAL CONTACT LOST. THEY ISSUED A L TURN TO 280 DEGS. BY THIS POINT WE HAD FLOWN THROUGH THE RWY 27L LOC AND GOT A TA FROM N PARALLEL TFC TO RWY 26R. PF INITIATED AN EVASIVE CLB TO AVOID A DC9 ACR Y ACFT. ATC ISSUED A FURTHER L TURN TO 250 DEGS TO REJOIN THE LOC RWY 27L. ATL APCH SWITCHED US QUICKLY TO TWR -- UNABLE TO ADVISE ATL OF EVASIVE MANEUVERS.

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.