Air carrier medium large transport just level 6000 ft, got TCASII TA and RA to climb. Followed TCASII to avoid climbing traffic below. RA ended at 6300 ft and returned to 6000 ft.

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Attributes
ACN	363340
Time
Date	199703
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : cgt airport : ord
State Reference	IL
Altitude	msl bound lower : 6000 msl bound upper : 6300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ord tower : mia
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	descent other
Route In Use	arrival star : star
Flight Plan	IFR
Aircraft 2
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 11200 flight time type : 1200
ASRS Report	363340
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 3000 vertical : 400
Supplementary
Air Traffic Incident	other

Narrative:

Shortly after leveling off at 6000 ft TCASII sounded a traffic alert followed by an RA commanding a 2000 FPM climb to avoid traffic at 11 O'clock 800 ft below and climbing. We followed the RA and advised ATC. We climbed to 6300 ft and saw traffic pass by below and slightly south of us. TCASII at that time showed the traffic 600 ft below and level. After clear of traffic returned to 6000 ft.

Original NASA ASRS Text

Title: ACR MLG JUST LEVEL 6000 FT, GOT TCASII TA AND RA TO CLB. FOLLOWED TCASII TO AVOID CLBING TFC BELOW. RA ENDED AT 6300 FT AND RETURNED TO 6000 FT.

Narrative: SHORTLY AFTER LEVELING OFF AT 6000 FT TCASII SOUNDED A TFC ALERT FOLLOWED BY AN RA COMMANDING A 2000 FPM CLB TO AVOID TFC AT 11 O'CLOCK 800 FT BELOW AND CLBING. WE FOLLOWED THE RA AND ADVISED ATC. WE CLBED TO 6300 FT AND SAW TFC PASS BY BELOW AND SLIGHTLY S OF US. TCASII AT THAT TIME SHOWED THE TFC 600 FT BELOW AND LEVEL. AFTER CLR OF TFC RETURNED TO 6000 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.