C525 with pct at 7000 ft on vectors to iad experienced TCASII RA with issued rj traffic.

Attributes
ACN	638845
Time
Date	200411
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : zdc.artcc
State Reference	VA
Altitude	msl single value : 7000
Environment
Flight Conditions	Mixed
Weather Elements	Turbulence
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdc.artcc
Operator	general aviation : corporate
Make Model Name	Citationjet, C525/C526
Operating Under FAR Part	Part 91
Flight Phase	descent : intermediate altitude
Flight Plan	IFR
Aircraft 2
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	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : atp
Experience	flight time last 90 days : 150 flight time total : 3800 flight time type : 500
ASRS Report	638845
Person 2
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne critical
Independent Detector	aircraft equipment : tcas other flight crewa
Resolutory Action	flight crew : took evasive action
Miss Distance	vertical : 500
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	ATC Human Performance

Narrative:

My citation jet 525 call sign is abc. Captain was PF, I was first officer in right seat. Was level at 7000 ft MSL, either on vectors or STAR. ATC called 'abc, turn left immediately to heading 280 degrees, rj 12 O'clock position.' my captain turned left, I called out he (rj) is 500 ft below and slightly right (off TCASII screen) and looked outside. My captain also climbed to get away from the rj. I read back initial call, and prioritize avoiding the rj over talking on the radio, and then read back after we were clear (5-10 seconds later). ATC gave altitude and heading and then passed us off to another approach controller. ATC never told us we had done anything wrong, or if the rj had done anything wrong. Therefore, we concluded it was ATC error. We never had visual on the rj. ATC had been mistakenly calling us 'bac' instead of the correct 'abc.' I caught all these errors, and read back and clarified appropriately.

Original NASA ASRS Text

Title: C525 WITH PCT AT 7000 FT ON VECTORS TO IAD EXPERIENCED TCASII RA WITH ISSUED RJ TFC.

Narrative: MY CITATION JET 525 CALL SIGN IS ABC. CAPT WAS PF, I WAS FO IN R SEAT. WAS LEVEL AT 7000 FT MSL, EITHER ON VECTORS OR STAR. ATC CALLED 'ABC, TURN L IMMEDIATELY TO HDG 280 DEGS, RJ 12 O'CLOCK POS.' MY CAPT TURNED L, I CALLED OUT HE (RJ) IS 500 FT BELOW AND SLIGHTLY R (OFF TCASII SCREEN) AND LOOKED OUTSIDE. MY CAPT ALSO CLBED TO GET AWAY FROM THE RJ. I READ BACK INITIAL CALL, AND PRIORITIZE AVOIDING THE RJ OVER TALKING ON THE RADIO, AND THEN READ BACK AFTER WE WERE CLR (5-10 SECONDS LATER). ATC GAVE ALT AND HDG AND THEN PASSED US OFF TO ANOTHER APCH CTLR. ATC NEVER TOLD US WE HAD DONE ANYTHING WRONG, OR IF THE RJ HAD DONE ANYTHING WRONG. THEREFORE, WE CONCLUDED IT WAS ATC ERROR. WE NEVER HAD VISUAL ON THE RJ. ATC HAD BEEN MISTAKENLY CALLING US 'BAC' INSTEAD OF THE CORRECT 'ABC.' I CAUGHT ALL THESE ERRORS, AND READ BACK AND CLARIFIED APPROPRIATELY.

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.