Altitude deviation TCASII RA.

Attributes
ACN	198439
Time
Date	199201
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : atl
State Reference	GA
Altitude	msl bound lower : 11000 msl bound upper : 11500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : atl
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	descent : approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : private pilot : atp
Experience	flight time last 90 days : 100 flight time total : 4500 flight time type : 150
ASRS Report	198439
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
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Miss Distance	unspecified : 1500
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were on approach control (126.9) being vectored to a right downwind to 26R at 11000 ft. The TCASII system activated with an RA and we climbed to about 11500. About 5-10 seconds after the RA alert the controller called out the traffic below and to the right. I believe it was an large transport climbing rapidly. We told him about our climb to 11500 and that we were correcting back to 11000. He acknowledged.

Original NASA ASRS Text

Title: ALTDEV TCASII RA.

Narrative: WE WERE ON APCH CTL (126.9) BEING VECTORED TO A R DOWNWIND TO 26R AT 11000 FT. THE TCASII SYS ACTIVATED WITH AN RA AND WE CLBED TO ABOUT 11500. ABOUT 5-10 SECONDS AFTER THE RA ALERT THE CTLR CALLED OUT THE TFC BELOW AND TO THE R. I BELIEVE IT WAS AN LGT CLBING RAPIDLY. WE TOLD HIM ABOUT OUR CLB TO 11500 AND THAT WE WERE CORRECTING BACK TO 11000. HE ACKNOWLEDGED.

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.