Potential conflict between 2 air carrier aircraft when the flight crew of the MD80 attempts an autoplt coupler turn to the localizer from a 90 degree approach angle to runway 9L at ord, il.

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Attributes
ACN	557657
Time
Date	200208
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ord.airport
State Reference	IL
Altitude	msl single value : 2500
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tower : ord.tower
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 9l
Flight Phase	descent : approach
Route In Use	arrival : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : ord.tower
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	descent : approach
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	557657
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	conflict : airborne critical non adherence : required legal separation non adherence : published procedure non adherence : clearance other spatial deviation
Independent Detector	aircraft equipment : tcas other flight crewa
Resolutory Action	flight crew : returned to intended or assigned course flight crew : took evasive action flight crew : overrode automation
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance Airspace Structure Aircraft ATC Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Approaching final to runway 9L at ord on a 90 degree left base, first officer flying, we allowed the autoplt localizer mode of the autoplt to make the turn on. We overshot and ended up between the runways. Captain directed first officer to override the autoplt and increase the bank angle to minimize the overshoot. TCASII RA received from traffic on final to runway 9R. Complied with RA instructions and intercepted final to runway 9L.

Original NASA ASRS Text

Title: POTENTIAL CONFLICT BTWN 2 ACR ACFT WHEN THE FLC OF THE MD80 ATTEMPTS AN AUTOPLT COUPLER TURN TO THE LOC FROM A 90 DEG APCH ANGLE TO RWY 9L AT ORD, IL.

Narrative: APCHING FINAL TO RWY 9L AT ORD ON A 90 DEG L BASE, FO FLYING, WE ALLOWED THE AUTOPLT LOC MODE OF THE AUTOPLT TO MAKE THE TURN ON. WE OVERSHOT AND ENDED UP BTWN THE RWYS. CAPT DIRECTED FO TO OVERRIDE THE AUTOPLT AND INCREASE THE BANK ANGLE TO MINIMIZE THE OVERSHOOT. TCASII RA RECEIVED FROM TFC ON FINAL TO RWY 9R. COMPLIED WITH RA INSTRUCTIONS AND INTERCEPTED FINAL TO RWY 9L.

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.