Medium large transport crew had TCASII RA in ZDC class a airspace.

Attributes
ACN	476892
Time
Date	200006
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : zdc.artcc
State Reference	DC
Altitude	msl bound lower : 23000 msl bound upper : 23700
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zdc.artcc tower : mdw.tower
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	cruise : level
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zdc.artcc
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : vacating altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 161 flight time total : 2200 flight time type : 402
ASRS Report	476892
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne critical non adherence : required legal separation non adherence : published procedure
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb
Resolutory Action	flight crew : took evasive action
Miss Distance	horizontal : 6000 vertical : 500
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	Ambiguous

Narrative:

We were level at FL230 awaiting clearance to climb higher. We got a TCASII RA to climb for traffic off our right wing. TCASII indicated his altitude approximately FL225. It was night, so I couldn't tell exactly what our horizontal separation was. Once clear of conflict we descended back to FL230 (we got about FL237 during our maneuver).

Original NASA ASRS Text

Title: MLG CREW HAD TCASII RA IN ZDC CLASS A AIRSPACE.

Narrative: WE WERE LEVEL AT FL230 AWAITING CLRNC TO CLB HIGHER. WE GOT A TCASII RA TO CLB FOR TFC OFF OUR R WING. TCASII INDICATED HIS ALT APPROX FL225. IT WAS NIGHT, SO I COULDN'T TELL EXACTLY WHAT OUR HORIZ SEPARATION WAS. ONCE CLR OF CONFLICT WE DSNDED BACK TO FL230 (WE GOT ABOUT FL237 DURING OUR MANEUVER).

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.