Multiple runway operation parallel runway approachs air carrier X TCASII RA abandoned approach.

Attributes
ACN	202317
Time
Date	199202
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : ord
State Reference	IL
Altitude	msl bound lower : 5000 msl bound upper : 5000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ord
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent : approach
Route In Use	approach : straight in
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
ASRS Report	202317
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : clearance
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	controller : issued new clearance flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

Air carrier X, approximately 15 mi final runway 27L, with traffic 1000 ft below, simultaneous approachs runway 27L. Air carrier X, still at 5000, said he needed to abandon the approach as a result of a TCASII alert. I told air carrier X to turn to 180 degrees and maintain 5000. A few seconds later, air carrier X said he could continue the approach. There was absolutely no reason for a TCASII alert. All aircraft were separated by 1000 ft, parallel headings.

Original NASA ASRS Text

Title: MULTIPLE RWY OP PARALLEL RWY APCHS ACR X TCASII RA ABANDONED APCH.

Narrative: ACR X, APPROX 15 MI FINAL RWY 27L, WITH TFC 1000 FT BELOW, SIMULTANEOUS APCHS RWY 27L. ACR X, STILL AT 5000, SAID HE NEEDED TO ABANDON THE APCH AS A RESULT OF A TCASII ALERT. I TOLD ACR X TO TURN TO 180 DEGS AND MAINTAIN 5000. A FEW SECONDS LATER, ACR X SAID HE COULD CONTINUE THE APCH. THERE WAS ABSOLUTELY NO REASON FOR A TCASII ALERT. ALL ACFT WERE SEPARATED BY 1000 FT, PARALLEL HDGS.

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.