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

Attributes
ACN	262224
Time
Date	199401
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : atl
State Reference	GA
Altitude	msl bound lower : 11000 msl bound upper : 12300
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : atl artcc : zoa
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : commercial pilot : atp pilot : instrument
Experience	flight time last 90 days : 150 flight time total : 16000 flight time type : 6000
ASRS Report	262224
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : overshoot conflict : airborne less severe non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 0 vertical : 700
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On approach into atl at 11000 ft 210 KTS, approach control advised of traffic at 12 O'clock, 6 mi, climbing to 10000 ft. Shortly thereafter, TCASII target turned red with aural warning to 'climb, climb'. Ivsi gauge showed 1/4 inch green arc at top starting at 2500 FPM up. I climbed, topping out at 12300 ft and reported my action to approach control. TCASII showed 700 ft altitude difference.

Original NASA ASRS Text

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

Narrative: ON APCH INTO ATL AT 11000 FT 210 KTS, APCH CTL ADVISED OF TFC AT 12 O'CLOCK, 6 MI, CLBING TO 10000 FT. SHORTLY THEREAFTER, TCASII TARGET TURNED RED WITH AURAL WARNING TO 'CLB, CLB'. IVSI GAUGE SHOWED 1/4 INCH GREEN ARC AT TOP STARTING AT 2500 FPM UP. I CLBED, TOPPING OUT AT 12300 FT AND RPTED MY ACTION TO APCH CTL. TCASII SHOWED 700 FT ALT DIFFERENCE.

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.