Large transport forced to go around as helicopter departing causes TCASII RA.

Attributes
ACN	263039
Time
Date	199402
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ord
State Reference	IL
Altitude	agl bound lower : 500 agl bound upper : 500
Environment
Flight Conditions	VMC
Light	Dawn
Aircraft 1
Controlling Facilities	tower : ord tracon : bur
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	descent : approach landing : go around
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Make Model Name	Helicopter
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial pilot : atp pilot : cfi
Experience	flight time last 90 days : 150 flight time total : 9000 flight time type : 6000
ASRS Report	263039
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : atp pilot : commercial
Events
Anomaly	other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	other
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 12000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

On short final to runway 27R at ord, while on the visual to that runway, we got a TCASII RA on previously unrpted helicopter traffic that was departing eastbound between runways 27R and 27L. Ord was aware of this traffic, but had forgotten to report it to us (he apologized as we went around). We got the TCASII RA and being unable to identify the traffic visually, we went around. Followed sops, came back around, and landed normally. Called tower when back on ground and he said he had at least 2 mi of horizontal separation, so no 'near miss' report necessary.

Original NASA ASRS Text

Title: LGT FORCED TO GAR AS HELI DEPARTING CAUSES TCASII RA.

Narrative: ON SHORT FINAL TO RWY 27R AT ORD, WHILE ON THE VISUAL TO THAT RWY, WE GOT A TCASII RA ON PREVIOUSLY UNRPTED HELI TFC THAT WAS DEPARTING EBOUND BTWN RWYS 27R AND 27L. ORD WAS AWARE OF THIS TFC, BUT HAD FORGOTTEN TO RPT IT TO US (HE APOLOGIZED AS WE WENT AROUND). WE GOT THE TCASII RA AND BEING UNABLE TO IDENT THE TFC VISUALLY, WE WENT AROUND. FOLLOWED SOPS, CAME BACK AROUND, AND LANDED NORMALLY. CALLED TWR WHEN BACK ON GND AND HE SAID HE HAD AT LEAST 2 MI OF HORIZ SEPARATION, SO NO 'NEAR MISS' RPT NECESSARY.

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.