Climbing aircraft came in close proximity to another IFR aircraft at level flight.

Attributes
ACN	107818
Time
Date	198903
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : sgf
State Reference	MO
Altitude	msl bound lower : 34600 msl bound upper : 36000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zkc
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : direct
Flight Plan	IFR
Aircraft 2
Operator	other
Make Model Name	Military Transport
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
ASRS Report	107818
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : published procedure non adherence : required legal separation
Independent Detector	atc equipment other atc equipment : unspecified other controllera
Resolutory Action	none taken : insufficient time
Consequence	faa : investigated
Miss Distance	horizontal : 22800 vertical : 1400
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Air carrier was climbing to cruise altitude north of sgf on J105. Mlt was level at FL350 wbound and crossing air carrier's route of flight. I monitored air carrier's rate of climb for several minutes and concluded that he would be level well before crossing with mlt at FL360. Air carrier's rate of climb fell off drastically and, although both aircraft were issued turns, they closed to 3.8 mi and 1400'.

Original NASA ASRS Text

Title: CLIMBING ACFT CAME IN CLOSE PROX TO ANOTHER IFR ACFT AT LEVEL FLT.

Narrative: ACR WAS CLBING TO CRUISE ALT N OF SGF ON J105. MLT WAS LEVEL AT FL350 WBOUND AND XING ACR'S ROUTE OF FLT. I MONITORED ACR'S RATE OF CLB FOR SEVERAL MINUTES AND CONCLUDED THAT HE WOULD BE LEVEL WELL BEFORE XING WITH MLT AT FL360. ACR'S RATE OF CLB FELL OFF DRASTICALLY AND, ALTHOUGH BOTH ACFT WERE ISSUED TURNS, THEY CLOSED TO 3.8 MI AND 1400'.

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.