Air carrier on climb out has TCASII RA. Complies.

Attributes
ACN	222561
Time
Date	199209
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : dfw
State Reference	TX
Altitude	msl bound lower : 9200 msl bound upper : 10000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : gnv
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors enroute airway : dfw
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 120 flight time total : 10850 flight time type : 300
ASRS Report	222561
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

This report concerns a TCASII RA incurred at 9700 ft during climb out from dfw. We were cleared to 10000 ft as per the pre departure clearance and SID. At approximately 9500 ft (with VNAV captured) TCASII issued a 'TA' alert, our climb out rate was approximately 1500 FPM. At 9700 ft TCASII issued a 'RA' accompanied by an audio command to 'descend' and a red and green arc depicted on the calibration indices of the vsi. (The red arc extended from our present climb rate 1000-1500 FPM, down to minus 1500 FPM -- the green arc extended from minus 1500-2000 FPM). We initiated a descent in accordance with the TCASII 'RA.' we advised dfw departure of our deviation and that we were now level at 9200 due to a TCASII 'RA.' they later said the 'RA' had been reported. During that 10-15 second pause our 'RA' ceased and we advised departure control that we were resuming our climb to 10000 ft. They acknowledged. I feel this TCASII 'RA' occurred due to the other aircraft's descent rate to 11000 ft and our climb rate to 10000 ft. Possibly the closure rates between the 2 aircraft was interpreted by the TCASII software as a potential threat.

Original NASA ASRS Text

Title: ACR ON CLB OUT HAS TCASII RA. COMPLIES.

Narrative: THIS RPT CONCERNS A TCASII RA INCURRED AT 9700 FT DURING CLB OUT FROM DFW. WE WERE CLRED TO 10000 FT AS PER THE PDC AND SID. AT APPROX 9500 FT (WITH VNAV CAPTURED) TCASII ISSUED A 'TA' ALERT, OUR CLB OUT RATE WAS APPROX 1500 FPM. AT 9700 FT TCASII ISSUED A 'RA' ACCOMPANIED BY AN AUDIO COMMAND TO 'DSND' AND A RED AND GREEN ARC DEPICTED ON THE CALIBRATION INDICES OF THE VSI. (THE RED ARC EXTENDED FROM OUR PRESENT CLB RATE 1000-1500 FPM, DOWN TO MINUS 1500 FPM -- THE GREEN ARC EXTENDED FROM MINUS 1500-2000 FPM). WE INITIATED A DSCNT IN ACCORDANCE WITH THE TCASII 'RA.' WE ADVISED DFW DEP OF OUR DEV AND THAT WE WERE NOW LEVEL AT 9200 DUE TO A TCASII 'RA.' THEY LATER SAID THE 'RA' HAD BEEN RPTED. DURING THAT 10-15 SECOND PAUSE OUR 'RA' CEASED AND WE ADVISED DEP CTL THAT WE WERE RESUMING OUR CLB TO 10000 FT. THEY ACKNOWLEDGED. I FEEL THIS TCASII 'RA' OCCURRED DUE TO THE OTHER ACFT'S DSCNT RATE TO 11000 FT AND OUR CLB RATE TO 10000 FT. POSSIBLY THE CLOSURE RATES BTWN THE 2 ACFT WAS INTERPRETED BY THE TCASII SOFTWARE AS A POTENTIAL THREAT.

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.