Air carrier medium large transport flight crew experiences altitude excursion due TCASII RA while in descent on scurry STAR to dfw.

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Attributes
ACN	179035
Time
Date	199105
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : scy airport : dfw
State Reference	TX
Altitude	msl bound lower : 11000 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : dfw
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport
Flight Phase	descent other
Route In Use	arrival other arrival star : star
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
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 : 2500 flight time type : 200
ASRS Report	179035
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 non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera
Resolutory Action	flight crew : took evasive action
Consequence	Other
Supplementary
Primary Problem	Ambiguous
Air Traffic Incident	Pilot Deviation

Narrative:

We heard and responded to an altitude and heading change from air carrier xyz 'heavy.' the first officer answered/repeated the clearance in a question like tone because we were not a heavy. The captain initiated the descent west/O verification because someone cut in on the controller. TCASII shortly thereafter gave a slow descent call, followed by a climb advisory. The controller came on and gave us a climb at the same time. We never visually saw the TCASII TA/RA aircraft.

Original NASA ASRS Text

Title: ACR MLG FLT CREW EXPERIENCES ALT EXCURSION DUE TCASII RA WHILE IN DESCENT ON SCURRY STAR TO DFW.

Narrative: WE HEARD AND RESPONDED TO AN ALT AND HDG CHANGE FROM ACR XYZ 'HVY.' THE F/O ANSWERED/REPEATED THE CLRNC IN A QUESTION LIKE TONE BECAUSE WE WERE NOT A HVY. THE CAPT INITIATED THE DSNT W/O VERIFICATION BECAUSE SOMEONE CUT IN ON THE CTLR. TCASII SHORTLY THEREAFTER GAVE A SLOW DSNT CALL, FOLLOWED BY A CLB ADVISORY. THE CTLR CAME ON AND GAVE US A CLB AT THE SAME TIME. WE NEVER VISUALLY SAW THE TCASII TA/RA ACFT.

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.