Air carrier X had less than standard separation from aircraft Y. System error.

Attributes
ACN	167220
Time
Date	199012
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : fwa
State Reference	IN
Altitude	msl bound lower : 21000 msl bound upper : 21000
Environment
Flight Conditions	Mixed
Light	Night
Aircraft 1
Controlling Facilities	artcc : zau
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
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 non radar : 4 controller radar : 3
ASRS Report	167220
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	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	faa : investigated
Miss Distance	horizontal : 25200 vertical : 700
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Air carrier X sebnd to cmh came within 4.2 mi latitude and 700' vertical of aircraft Y, who was descending to FL190 from high altitude. Aircraft Y was asked to climb to and maintain FL220, but had already came within prescribed boundaries. Aircraft Y should have been stopped on top of air carrier X instead of attempting to get him below the aircraft.

Original NASA ASRS Text

Title: ACR X HAD LESS THAN STANDARD SEPARATION FROM ACFT Y. SYSTEM ERROR.

Narrative: ACR X SEBND TO CMH CAME WITHIN 4.2 MI LAT AND 700' VERT OF ACFT Y, WHO WAS DSNDING TO FL190 FROM HIGH ALT. ACFT Y WAS ASKED TO CLB TO AND MAINTAIN FL220, BUT HAD ALREADY CAME WITHIN PRESCRIBED BOUNDARIES. ACFT Y SHOULD HAVE BEEN STOPPED ON TOP OF ACR X INSTEAD OF ATTEMPTING TO GET HIM BELOW THE ACFT.

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.