Medium large transport has TCASII RA. Had traffic in sight but climbed.

Attributes
ACN	209400
Time
Date	199205
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : buj
State Reference	TX
Altitude	msl bound lower : 10000 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : dfw
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	descent other
Route In Use	arrival other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : flight engineer
Experience	flight time total : 2300
ASRS Report	209400
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
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 other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 1600 vertical : 900
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On 'blue ridge 3 arrival' into dfw we had a TCASII RA to climb 1000-1500 FPM. We were level at 11000 ft and slowing from 250-210 KTS as we approached the hamak intersection. We had not been given a TA by ATC, however, I had visual with an medium large transport aircraft, climbing out from dfw above an undercast. It was at 2 O'clock and as we approached the traffic it began to move aft on the wind screen. From my perspective, the traffic was not a threat. As the traffic passed 3 O'clock, TCASII gave us a climb command. It showed traffic at approximately 1 mi, 3 O'clock, 900 ft below and climbing. I visually confirmed the traffic's position as we initiated the climb. The captain felt we should follow the commands to be on the safe side. We followed the TCASII instructions until we were given the 'clear of traffic' call then we descended and followed ATC's new instructions. During the TCASII alert we had to ignore altitude, heading, and airspeed restrictions given almost simultaneously with the TCASII commands. Although the traffic had been a factor, neither the captain nor I thought it was a threat. After landing a TRACON supervisor assured us that the traffic was level 1000 ft below us and that it passed behind us.

Original NASA ASRS Text

Title: MLG HAS TCASII RA. HAD TFC IN SIGHT BUT CLBED.

Narrative: ON 'BLUE RIDGE 3 ARR' INTO DFW WE HAD A TCASII RA TO CLB 1000-1500 FPM. WE WERE LEVEL AT 11000 FT AND SLOWING FROM 250-210 KTS AS WE APCHED THE HAMAK INTXN. WE HAD NOT BEEN GIVEN A TA BY ATC, HOWEVER, I HAD VISUAL WITH AN MLG ACFT, CLBING OUT FROM DFW ABOVE AN UNDERCAST. IT WAS AT 2 O'CLOCK AND AS WE APCHED THE TFC IT BEGAN TO MOVE AFT ON THE WIND SCREEN. FROM MY PERSPECTIVE, THE TFC WAS NOT A THREAT. AS THE TFC PASSED 3 O'CLOCK, TCASII GAVE US A CLB COMMAND. IT SHOWED TFC AT APPROX 1 MI, 3 O'CLOCK, 900 FT BELOW AND CLBING. I VISUALLY CONFIRMED THE TFC'S POS AS WE INITIATED THE CLB. THE CAPT FELT WE SHOULD FOLLOW THE COMMANDS TO BE ON THE SAFE SIDE. WE FOLLOWED THE TCASII INSTRUCTIONS UNTIL WE WERE GIVEN THE 'CLR OF TFC' CALL THEN WE DSNDED AND FOLLOWED ATC'S NEW INSTRUCTIONS. DURING THE TCASII ALERT WE HAD TO IGNORE ALT, HDG, AND AIRSPD RESTRICTIONS GIVEN ALMOST SIMULTANEOUSLY WITH THE TCASII COMMANDS. ALTHOUGH THE TFC HAD BEEN A FACTOR, NEITHER THE CAPT NOR I THOUGHT IT WAS A THREAT. AFTER LNDG A TRACON SUPVR ASSURED US THAT THE TFC WAS LEVEL 1000 FT BELOW US AND THAT IT PASSED BEHIND US.

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.