Cpr X had less than standard separation from air carrier Y. System error.

Attributes
ACN	183261
Time
Date	199107
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : air
State Reference	OH
Altitude	msl bound lower : 37000 msl bound upper : 37000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob
Operator	general aviation : corporate
Make Model Name	Light Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	cruise other
Route In Use	enroute : direct
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
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : flight data
Qualification	controller : developmental
Experience	controller non radar : 1
ASRS Report	183261
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation non adherence : published procedure
Independent Detector	atc equipment other atc equipment : unspecified
Resolutory Action	controller : issued new clearance other
Consequence	faa : investigated
Miss Distance	horizontal : 8400 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Cpr X was sebound on J34 air J80 eastbound landing thv. The second plane air carrier Y was wbound on J80 landing at stl. Here was another air carrier flight at 350 parallel to air carrier Y slowly overtaking him, also landing at stl. Prior to this there were approximately 4 flts landing in the dca-iad-bwi area flying through. These flts usually come sebound on J34 just like cpr X. I thought cpr X was another washington area airplane. The radar controller had run out his 8 min vector lines and if cpr X had continued onto the washington area he was no factor with air carrier Y. Cpr X turned eastbound onto J80 at air, approximately 2 mins later they passed each other at 1.4 mi apart. The radar controller gave air carrier Y a right turn. He didn't respond. He then turned cpr X to the right. The conflict alert initially went off at 3.9 mi apart.

Original NASA ASRS Text

Title: CPR X HAD LTSS FROM ACR Y. SYS ERROR.

Narrative: CPR X WAS SEBOUND ON J34 AIR J80 EBOUND LNDG THV. THE SECOND PLANE ACR Y WAS WBOUND ON J80 LNDG AT STL. HERE WAS ANOTHER ACR FLT AT 350 PARALLEL TO ACR Y SLOWLY OVERTAKING HIM, ALSO LNDG AT STL. PRIOR TO THIS THERE WERE APPROX 4 FLTS LNDG IN THE DCA-IAD-BWI AREA FLYING THROUGH. THESE FLTS USUALLY COME SEBOUND ON J34 JUST LIKE CPR X. I THOUGHT CPR X WAS ANOTHER WASHINGTON AREA AIRPLANE. THE RADAR CTLR HAD RUN OUT HIS 8 MIN VECTOR LINES AND IF CPR X HAD CONTINUED ONTO THE WASHINGTON AREA HE WAS NO FACTOR WITH ACR Y. CPR X TURNED EBOUND ONTO J80 AT AIR, APPROX 2 MINS LATER THEY PASSED EACH OTHER AT 1.4 MI APART. THE RADAR CTLR GAVE ACR Y A R TURN. HE DIDN'T RESPOND. HE THEN TURNED CPR X TO THE R. THE CONFLICT ALERT INITIALLY WENT OFF AT 3.9 MI APART.

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.