A carj crew, during descent to 10000 ft, responded to a climb RA from TCASII.

Attributes
ACN	555672
Time
Date	200208
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	intersection : falko
State Reference	VA
Altitude	msl bound lower : 11500 msl bound upper : 12000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdc.artcc
Operator	common carrier : air carrier
Make Model Name	Regional Jet CL65, Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : intermediate altitude
Route In Use	arrival star : n/s
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zdc.artcc
Make Model Name	Golden Eagle 421
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : atp
Experience	flight time last 90 days : 110 flight time total : 14000 flight time type : 2000
ASRS Report	555672
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	conflict : airborne critical non adherence : published procedure
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance flight crew : took evasive action flight crew : exited adverse environment other
Consequence	faa : reviewed incident with flight crew
Miss Distance	vertical : 400
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance Airspace Structure
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

We were issued clearance to 10000 ft MSL. At 12000 ft and descending, we received a TA 'reduce descent' and a TA. RA sounded for 'climb, climb' and we complied with (both) commands. We told ATC we were responding to an RA and he said 'ok, maintain 12000 ft.' we advised ATC we had clearance to 10000 ft. My copilot and I agreed that we had indeed received clearance to 10000 ft addressed to us, and confirmed from us. A similar call sign was on frequency and we were in agreement that we were already aware of this complication and were already 'attuned' to the call signs and especially vigilant when the clearance to 10000 ft was received.

Original NASA ASRS Text

Title: A CARJ CREW, DURING DSCNT TO 10000 FT, RESPONDED TO A CLB RA FROM TCASII.

Narrative: WE WERE ISSUED CLRNC TO 10000 FT MSL. AT 12000 FT AND DSNDING, WE RECEIVED A TA 'REDUCE DSCNT' AND A TA. RA SOUNDED FOR 'CLB, CLB' AND WE COMPLIED WITH (BOTH) COMMANDS. WE TOLD ATC WE WERE RESPONDING TO AN RA AND HE SAID 'OK, MAINTAIN 12000 FT.' WE ADVISED ATC WE HAD CLRNC TO 10000 FT. MY COPLT AND I AGREED THAT WE HAD INDEED RECEIVED CLRNC TO 10000 FT ADDRESSED TO US, AND CONFIRMED FROM US. A SIMILAR CALL SIGN WAS ON FREQ AND WE WERE IN AGREEMENT THAT WE WERE ALREADY AWARE OF THIS COMPLICATION AND WERE ALREADY 'ATTUNED' TO THE CALL SIGNS AND ESPECIALLY VIGILANT WHEN THE CLRNC TO 10000 FT WAS RECEIVED.

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.