Air carrier in holding pattern has TCASII RA.

Attributes
ACN	302132
Time
Date	199504
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : ord
State Reference	IL
Altitude	msl bound lower : 13600 msl bound upper : 14000
Aircraft 1
Controlling Facilities	artcc : zau
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	other
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Flight Phase	cruise other
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 200 flight time total : 13000 flight time type : 6000
ASRS Report	302132
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action flight crew : returned to intended course or assigned course
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

Got a TCASII RA at 14000 ft in holding pattern at haile intersection. Commanded to descend. Descended to 13600 ft, RA stopped. Watched blip out TCASII, estimated to be at 14500 ft. When aircraft passed, we climbed back to 14000 ft. ATC misidented traffic and never saw aircraft passing through holding pattern VFR at approximately 14500 ft. ATC then asked us to call the ir facility. At one time, TCASII was giving problems due to ghosts on screen. We feel very confident this was not a ghost and took action as commanded.

Original NASA ASRS Text

Title: ACR IN HOLDING PATTERN HAS TCASII RA.

Narrative: GOT A TCASII RA AT 14000 FT IN HOLDING PATTERN AT HAILE INTXN. COMMANDED TO DSND. DSNDED TO 13600 FT, RA STOPPED. WATCHED BLIP OUT TCASII, ESTIMATED TO BE AT 14500 FT. WHEN ACFT PASSED, WE CLBED BACK TO 14000 FT. ATC MISIDENTED TFC AND NEVER SAW ACFT PASSING THROUGH HOLDING PATTERN VFR AT APPROX 14500 FT. ATC THEN ASKED US TO CALL THE IR FACILITY. AT ONE TIME, TCASII WAS GIVING PROBS DUE TO GHOSTS ON SCREEN. WE FEEL VERY CONFIDENT THIS WAS NOT A GHOST AND TOOK ACTION AS COMMANDED.

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.