AT72 and CL65 crj had TCASII RA's and a potential conflict.

Attributes
ACN	418885
Time
Date	199811
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : atl airport : atl
State Reference	GA
Altitude	msl bound lower : 8500 msl bound upper : 8500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : atl tower : bos
Operator	common carrier : air carrier
Make Model Name	ATR 72
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	climbout : intermediate altitude
Route In Use	departure other enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Challenger CL604
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude
Route In Use	departure other enroute : on vectors
Flight Plan	IFR
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 : 20000
ASRS Report	418885
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	controller : issued new clearance flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 250 vertical : 900
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Climbing out of atl, out of 8500 ft, we received a TCASII alert, followed by RA 'climb!' looked at 8 O'clock position and observed a company crj aimed at us. We continued our climb, approximately 1200-1500 FPM (maximum climb at our gross weight). We heard the atl departure controller tell our company flight to level at 7500 ft MSL. We observed our company crj almost directly below us in a steep (more than 30 degree) left bank. I spoke to other captain via radio about the near miss. We believe the departure controller was late in turning the crj sbound. Supplemental information from acn 419521: we were departing atl off runway 27R climbing through 6500 ft. We were given a turn to 170 degrees (from a 255 degree heading). At 6500 ft we had a TA on the TCASII. My first officer saw the traffic at 2 O'clock position (an ATR 72 climbing out of about 9000 ft). We began a leveloff at that time. We then got an RA on the TCASII and atl told us to stop our climb at 7500 ft. We ascended to 8200 ft before we could stop the climb (due to our momentum). To my knowledge, we were never closer than 500-1000 ft horizontal. I believe our climb and closure rates made it look closer on the TCASII. ATC workload at the time was very heavy.

Original NASA ASRS Text

Title: AT72 AND CL65 CRJ HAD TCASII RA'S AND A POTENTIAL CONFLICT.

Narrative: CLBING OUT OF ATL, OUT OF 8500 FT, WE RECEIVED A TCASII ALERT, FOLLOWED BY RA 'CLB!' LOOKED AT 8 O'CLOCK POS AND OBSERVED A COMPANY CRJ AIMED AT US. WE CONTINUED OUR CLB, APPROX 1200-1500 FPM (MAX CLB AT OUR GROSS WT). WE HEARD THE ATL DEP CTLR TELL OUR COMPANY FLT TO LEVEL AT 7500 FT MSL. WE OBSERVED OUR COMPANY CRJ ALMOST DIRECTLY BELOW US IN A STEEP (MORE THAN 30 DEG) L BANK. I SPOKE TO OTHER CAPT VIA RADIO ABOUT THE NEAR MISS. WE BELIEVE THE DEP CTLR WAS LATE IN TURNING THE CRJ SBOUND. SUPPLEMENTAL INFO FROM ACN 419521: WE WERE DEPARTING ATL OFF RWY 27R CLBING THROUGH 6500 FT. WE WERE GIVEN A TURN TO 170 DEGS (FROM A 255 DEG HDG). AT 6500 FT WE HAD A TA ON THE TCASII. MY FO SAW THE TFC AT 2 O'CLOCK POS (AN ATR 72 CLBING OUT OF ABOUT 9000 FT). WE BEGAN A LEVELOFF AT THAT TIME. WE THEN GOT AN RA ON THE TCASII AND ATL TOLD US TO STOP OUR CLB AT 7500 FT. WE ASCENDED TO 8200 FT BEFORE WE COULD STOP THE CLB (DUE TO OUR MOMENTUM). TO MY KNOWLEDGE, WE WERE NEVER CLOSER THAN 500-1000 FT HORIZ. I BELIEVE OUR CLB AND CLOSURE RATES MADE IT LOOK CLOSER ON THE TCASII. ATC WORKLOAD AT THE TIME WAS VERY HVY.

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.