B737 flight crew incorrectly identify and fly ord runway ILS runway 27L approach, having been cleared for the ILS runway 27R, and are corrected by C90.

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Attributes
ACN	500339
Time
Date	200102
Day	Mon
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : ord.airport
State Reference	IL
Altitude	msl single value : 4000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : c90.tracon
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 27l ils other localizer
Flight Phase	descent : approach
Route In Use	approach : instrument precision arrival : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	500339
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
ASRS Report	500340
Events
Anomaly	non adherence : clearance non adherence : published procedure other spatial deviation
Independent Detector	atc equipment other atc equipment : radar other controllera
Resolutory Action	controller : issued new clearance controller : issued advisory flight crew : returned to intended or assigned course flight crew : became reoriented
Consequence	faa : reviewed incident with flight crew other
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

ILS runway 27R was selected for ord with centerline extended. First officer dialed in incorrect runway 27L frequency and aircraft captured runway 27L localizer. Both pilots noticed lineup anomaly and were correcting the problem when approach called and told us it looked like we were tracking runway 27L. We confirmed the misalignment as we sidestepped to runway 27R. Flight conditions were VFR on top. No conflict occurred and aircraft tracked and completed ILS to runway 27R.

Original NASA ASRS Text

Title: B737 FLC INCORRECTLY IDENT AND FLY ORD RWY ILS RWY 27L APCH, HAVING BEEN CLRED FOR THE ILS RWY 27R, AND ARE CORRECTED BY C90.

Narrative: ILS RWY 27R WAS SELECTED FOR ORD WITH CTRLINE EXTENDED. FO DIALED IN INCORRECT RWY 27L FREQ AND ACFT CAPTURED RWY 27L LOC. BOTH PLTS NOTICED LINEUP ANOMALY AND WERE CORRECTING THE PROB WHEN APCH CALLED AND TOLD US IT LOOKED LIKE WE WERE TRACKING RWY 27L. WE CONFIRMED THE MISALIGNMENT AS WE SIDESTEPPED TO RWY 27R. FLT CONDITIONS WERE VFR ON TOP. NO CONFLICT OCCURRED AND ACFT TRACKED AND COMPLETED ILS TO RWY 27R.

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.