Cpr X climb through occupied altitude had less than standard separation from aircraft Y. System erro...

Attributes
ACN	269638
Time
Date	199404
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : tyi
State Reference	NC
Altitude	msl bound lower : 29000 msl bound upper : 29000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdc
Operator	general aviation : corporate
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : direct
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller non radar : 2 controller radar : 24
ASRS Report	269638
Person 2
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation
Independent Detector	atc equipment other atc equipment : unspecified
Resolutory Action	controller : issued new clearance other
Consequence	faa : investigated
Miss Distance	horizontal : 12000 vertical : 200
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Traffic in the sector was relatively light. Approximately 8 airplanes but it was somewhat complex. At least 4 of these planes had been rerouted into the sector due to WX. I was transitioning 2 of them into the low altitude stratum and vectoring 1 other. Cpr X was at FL280 requesting FL350 and Y was at FL290 and already handed off to the next sector. I was vectoring Z who was at FL310, away from X to transition the aircraft to a lower altitude and also to climb X to his requested of FL350. I became busy with some point-outs, and after Z had cleared X by 5 mi, I climbed X to FL350 and descended Z to FL260. I was observing a 40 KT overtake situation and when I saw the conflict alert between Y and X, I descended X back to FL280 but separation had already been lost.

Original NASA ASRS Text

Title: CPR X CLB THROUGH OCCUPIED ALT HAD LTSS FROM ACFT Y. SYS ERROR.

Narrative: TFC IN THE SECTOR WAS RELATIVELY LIGHT. APPROX 8 AIRPLANES BUT IT WAS SOMEWHAT COMPLEX. AT LEAST 4 OF THESE PLANES HAD BEEN REROUTED INTO THE SECTOR DUE TO WX. I WAS TRANSITIONING 2 OF THEM INTO THE LOW ALT STRATUM AND VECTORING 1 OTHER. CPR X WAS AT FL280 REQUESTING FL350 AND Y WAS AT FL290 AND ALREADY HANDED OFF TO THE NEXT SECTOR. I WAS VECTORING Z WHO WAS AT FL310, AWAY FROM X TO TRANSITION THE ACFT TO A LOWER ALT AND ALSO TO CLB X TO HIS REQUESTED OF FL350. I BECAME BUSY WITH SOME POINT-OUTS, AND AFTER Z HAD CLRED X BY 5 MI, I CLBED X TO FL350 AND DSNDED Z TO FL260. I WAS OBSERVING A 40 KT OVERTAKE SIT AND WHEN I SAW THE CONFLICT ALERT BTWN Y AND X, I DSNDED X BACK TO FL280 BUT SEPARATION HAD ALREADY BEEN LOST.

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.

Cpr X climb through occupied altitude had less than standard separation from aircraft Y. System error.