An air carrier medium large transport climbed in response to a TCASII command.

Attributes
ACN	230201
Time
Date	199212
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : bpr airport : dfw
State Reference	TX
Altitude	msl bound lower : 11000 msl bound upper : 11400
Environment
Flight Conditions	Mixed
Light	Night
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	cruise other
Route In Use	arrival other arrival star : star enroute airway : dfw
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	departure other departure sid : sid
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 70 flight time total : 9000 flight time type : 2300
ASRS Report	230201
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : excursion from assigned altitude other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 3000 vertical : 1100
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

We were level at 11000 ft MSL, executing the boids 2 arrival. While approaching the pivit intersection, approach control announced departure traffic would be leveling at 10000 ft at our 10 O'clock position. There was a lower deck of clouds preventing visual contact. As the traffic leveled at 10000 ft, TCASII gave an RA and a climb command. It never showed the traffic less than 1100 ft below us. We followed the TCASII command and started a climb, announcing this to approach control. At 11400 ft, TCASII went from RA to normal and we descended back to 11000 ft.

Original NASA ASRS Text

Title: AN ACR MLG CLBED IN RESPONSE TO A TCASII COMMAND.

Narrative: WE WERE LEVEL AT 11000 FT MSL, EXECUTING THE BOIDS 2 ARR. WHILE APCHING THE PIVIT INTXN, APCH CTL ANNOUNCED DEP TFC WOULD BE LEVELING AT 10000 FT AT OUR 10 O'CLOCK POS. THERE WAS A LOWER DECK OF CLOUDS PREVENTING VISUAL CONTACT. AS THE TFC LEVELED AT 10000 FT, TCASII GAVE AN RA AND A CLB COMMAND. IT NEVER SHOWED THE TFC LESS THAN 1100 FT BELOW US. WE FOLLOWED THE TCASII COMMAND AND STARTED A CLB, ANNOUNCING THIS TO APCH CTL. AT 11400 FT, TCASII WENT FROM RA TO NORMAL AND WE DSNDED BACK TO 11000 FT.

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.