Potential conflict avoided as ARTCC radar controller reverses ATC clearance and issues climb radar vector to avoid opposite direction traffic. TCASII TA at the same time.

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Attributes
ACN	201894
Time
Date	199201
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : orf
State Reference	VA
Altitude	msl bound lower : 36300 msl bound upper : 37000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdc tracon : n90
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	descent other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 10000 flight time type : 1800
ASRS Report	201894
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera
Resolutory Action	controller : issued new clearance flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 48000 vertical : 1500
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

ATC gave a descent clearance from en route altitude of FL370 to FL330. As we passed through 36300 jax center gave us an immediate climb clearance back to FL370 and a left turn to 330 heading. Just as ATC gave us the vectors the TCASII alert came back on with just a 'TA.' I had the conflict aircraft both visually and on TCASII.

Original NASA ASRS Text

Title: POTENTIAL CONFLICT AVOIDED AS ARTCC RADAR CTLR REVERSES ATC CLRNC AND ISSUES CLB RADAR VECTOR TO AVOID OPPOSITE DIRECTION TFC. TCASII TA AT THE SAME TIME.

Narrative: ATC GAVE A DSCNT CLRNC FROM ENRTE ALT OF FL370 TO FL330. AS WE PASSED THROUGH 36300 JAX CTR GAVE US AN IMMEDIATE CLB CLRNC BACK TO FL370 AND A L TURN TO 330 HDG. JUST AS ATC GAVE US THE VECTORS THE TCASII ALERT CAME BACK ON WITH JUST A 'TA.' I HAD THE CONFLICT ACFT BOTH VISUALLY AND ON TCASII.

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.