CRJ200 captain reports TCAS climb RA approaching 10;000 ft departing atl. Warning reversed to a desc...

Attributes
ACN	824200
Time
Date	200902
Local Time Of Day	0001-0600
Place
Locale Reference	ATL.Airport
State Reference	GA
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Make Model Name	Regional Jet 200 ER/LR (CRJ200)
Operating Under FAR Part	Part 121
Flight Phase	Climb
Route In Use	Other Dooly
Flight Plan	IFR
Component
Aircraft Component	Traffic Collision Avoidance System (TCAS)
Person 1
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Departure
Events
Anomaly	Aircraft Equipment Problem Critical Conflict Airborne Conflict Deviation - Altitude Excursion From Assigned Altitude Inflight Event / Encounter Weather / Turbulence

Narrative:

During climbout on the dooly departure we were in moderate turbulence and IMC. Prior to leveling off at 10;000 ft; at 250 KTS and in the turn at zelan; we received a TA which subsequently turned into an RA requiring a climb of more than 2;000 ft on the vsi. While complying; we notified ATC of the RA and that we were climbing through 10;300 ft. Through 11;000 ft; the TCAS required a descent; which we also complied with. Atlanta TRACON was called once we reached our destination. He informed us that no separation was lost and that no action would be taken. He did; however; want us to address the TCAS system as it should have had us initiate a descent; instead of a climb. We were told that the other aircraft also received an RA and was climbing as well. I spoke with maintenance and informed them of what happened. The decision was made to defer the TCAS. ATC seems to think it was a system malfunction. I wonder if it had anything to do with the turn and perhaps the turbulence?

Original NASA ASRS Text

Title: CRJ200 Captain reports TCAS climb RA approaching 10;000 FT departing ATL. Warning reversed to a descend RA approaching 11;000 FT. Post flight discussion with Controller revealed aircraft Y had steady climb RA for entire event.

Narrative: During climbout on the DOOLY departure we were in moderate turbulence and IMC. Prior to leveling off at 10;000 FT; at 250 KTS and in the turn at ZELAN; we received a TA which subsequently turned into an RA requiring a climb of more than 2;000 FT on the VSI. While complying; we notified ATC of the RA and that we were climbing through 10;300 FT. Through 11;000 FT; the TCAS required a descent; which we also complied with. Atlanta TRACON was called once we reached our destination. He informed us that no separation was lost and that no action would be taken. He did; however; want us to address the TCAS system as it should have had us initiate a descent; instead of a climb. We were told that the other aircraft also received an RA and was climbing as well. I spoke with Maintenance and informed them of what happened. The decision was made to defer the TCAS. ATC seems to think it was a system malfunction. I wonder if it had anything to do with the turn and perhaps the turbulence?

Data retrieved from NASA's ASRS site as of April 2012 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.

CRJ200 captain reports TCAS climb RA approaching 10;000 ft departing atl. Warning reversed to a descend RA approaching 11;000 ft. Post flight discussion with controller revealed aircraft Y had steady climb RA for entire event.