Cpr Y climb to occupied altitude had less than standard separation from air carrier X. System error.

Attributes
ACN	264932
Time
Date	199403
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : aml
State Reference	VA
Altitude	msl bound lower : 28000 msl bound upper : 28000
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Controlling Facilities	tower : crw
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	cruise other
Route In Use	enroute : direct enroute airway : zdc
Flight Plan	IFR
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Citation II S2/Bravo
Operating Under FAR Part	Part 91
Navigation In Use	Other
Flight Phase	descent other
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller military : 4 controller non radar : 1 controller radar : 25
ASRS Report	264932
Person 2
Affiliation	company : air carrier
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 other controllera
Resolutory Action	controller : issued new clearance other
Consequence	faa : investigated
Miss Distance	horizontal : 27600 vertical : 700
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Air carrier X (B727) en route J6 at FL280 (west of mrb VOR) and cpr Y (C550) on J149 (west of aml VOR) crossing J6. I climbed Y to FL280, became aware of overtake/crossing X, turned X left heading 230 degrees, descended Y back to FL270. Y reported level at FL270 11 seconds after immediate alert was activated. Resulting in a loss of separation of 4.6 NM and 700 ft.

Original NASA ASRS Text

Title: CPR Y CLB TO OCCUPIED ALT HAD LTSS FROM ACR X. SYS ERROR.

Narrative: ACR X (B727) ENRTE J6 AT FL280 (W OF MRB VOR) AND CPR Y (C550) ON J149 (W OF AML VOR) XING J6. I CLBED Y TO FL280, BECAME AWARE OF OVERTAKE/XING X, TURNED X L HDG 230 DEGS, DSNDED Y BACK TO FL270. Y RPTED LEVEL AT FL270 11 SECONDS AFTER IMMEDIATE ALERT WAS ACTIVATED. RESULTING IN A LOSS OF SEPARATION OF 4.6 NM AND 700 FT.

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.