Less than standard separation between 2 air carrier aircraft. Operational error.

Attributes
ACN	187783
Time
Date	199108
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : rod
State Reference	OH
Altitude	msl bound lower : 18400 msl bound upper : 19000
Environment
Flight Conditions	Marginal
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	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller non radar : 3 controller radar : 2
ASRS Report	187783
Person 2
Affiliation	company : air carrier
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	controller : issued new clearance none taken : unable other
Consequence	faa : investigated
Miss Distance	horizontal : 24000 vertical : 600
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Air carrier X FL180 requesting higher, nebound. Other aircraft Y at FL190 also nebound. Both aircraft assigned present headings. Light thunderstorms in the area causing WX deviations. Air carrier X heading is 060 degree, other aircraft heading slightly to the north of air carrier X heading. Controller did not notice the aircraft slowly coming together until operational error occurred. Turn was issued to air carrier X and report asked for -- but not in sufficient time.

Original NASA ASRS Text

Title: LTSS BTWN 2 ACR ACFT. OPERROR.

Narrative: ACR X FL180 REQUESTING HIGHER, NEBOUND. OTHER ACFT Y AT FL190 ALSO NEBOUND. BOTH ACFT ASSIGNED PRESENT HDGS. LIGHT TSTMS IN THE AREA CAUSING WX DEVS. ACR X HDG IS 060 DEG, OTHER ACFT HDG SLIGHTLY TO THE N OF ACR X HDG. CTLR DID NOT NOTICE THE ACFT SLOWLY COMING TOGETHER UNTIL OPERROR OCCURRED. TURN WAS ISSUED TO ACR X AND RPT ASKED FOR -- BUT NOT IN SUFFICIENT TIME.

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.