Air carrier X had less than standard radar separation from air carrier Y. System error. TCASII RA ev...

Attributes
ACN	176876
Time
Date	199105
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : bwi
State Reference	MD
Altitude	msl bound lower : 4000 msl bound upper : 4000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : bwi
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	cruise other
Route In Use	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 : 250 flight time total : 8000
ASRS Report	176876
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance non adherence : published procedure non adherence : required legal separation
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 6000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

ATC vectored air carrier X too close to air carrier Y, which was co-located at our altitude. My aircraft was TCAS equipped and issued an RA to climb to avoid collision. RA was performed and ATC notified of deviation. Problem was caused by overworked ATC controller!

Original NASA ASRS Text

Title: ACR X HAD LESS THAN STANDARD RADAR SEPARATION FROM ACR Y. SYSTEM ERROR. TCASII RA EVASIVE ACTION TAKEN.

Narrative: ATC VECTORED ACR X TOO CLOSE TO ACR Y, WHICH WAS CO-LOCATED AT OUR ALT. MY ACFT WAS TCAS EQUIPPED AND ISSUED AN RA TO CLB TO AVOID COLLISION. RA WAS PERFORMED AND ATC NOTIFIED OF DEVIATION. PROB WAS CAUSED BY OVERWORKED ATC CTLR!

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.

Air carrier X had less than standard radar separation from air carrier Y. System error. TCASII RA evasive action taken.