Less than standard separation between air carrier and corp jet. Operational error.

Attributes
ACN	86808
Time
Date	198805
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : pxv
State Reference	IN
Altitude	msl bound lower : 31000 msl bound upper : 31000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zid
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Light Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 5
ASRS Report	86808
Person 2
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe inflight encounter : weather non adherence : required legal separation
Independent Detector	other controllera
Resolutory Action	none taken : unable
Consequence	faa : investigated
Miss Distance	horizontal : 25200 vertical : 100
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Air carrier X climbing east out of stl. Corp Y climbing west out of sdf. Thunderstorms in area and aircraft deviating. Assigned headings to avoid one another, but was not sufficient to maintain sep. Attempted to turn air carrier X. Aircraft X could not accept turn. Assigned X present heading, it appeared I would have sufficient sep. Both aircraft turned out, but was too late.

Original NASA ASRS Text

Title: LESS THAN STANDARD SEPARATION BETWEEN ACR AND CORP JET. OPERATIONAL ERROR.

Narrative: ACR X CLBING E OUT OF STL. CORP Y CLBING W OUT OF SDF. TSTMS IN AREA AND ACFT DEVIATING. ASSIGNED HDGS TO AVOID ONE ANOTHER, BUT WAS NOT SUFFICIENT TO MAINTAIN SEP. ATTEMPTED TO TURN ACR X. ACFT X COULD NOT ACCEPT TURN. ASSIGNED X PRESENT HDG, IT APPEARED I WOULD HAVE SUFFICIENT SEP. BOTH ACFT TURNED OUT, BUT WAS TOO LATE.

Data retrieved from NASA's ASRS site as of August 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.