Cga light transport climbed through an occupied altitude, resulting in less than standard separation...

Attributes
ACN	122557
Time
Date	198909
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : bdf
State Reference	IL
Altitude	msl bound lower : 39000 msl bound upper : 40300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zau
Operator	general aviation : corporate
Make Model Name	Light Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Light Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 19
ASRS Report	122557
Person 2
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	conflict : airborne less severe non adherence : clearance non adherence : published procedure non adherence : required legal separation other anomaly other
Independent Detector	atc equipment other atc equipment : unspecified other controllera
Resolutory Action	controller : issued new clearance
Consequence	Other
Miss Distance	horizontal : 19200 vertical : 1300
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error Pilot Deviation

Narrative:

Cga X at FL370 requested FL410. There was plenty of room between him and cga Y wbound at FL390, so I climbed him. After awhile it became apparent that cga X was not going to be level in time. At this time the aircraft were approximately 3 mins apart. I asked the pilot if he could be level in a 1 1/2 mins, and he replied in the affirmative. I turned to other duties and when I turned back, I noticed a slow rate of climb. I asked the pilot his rate of climb and he said 600 FPM. I turned both aircraft, but too late to prevent the system error. At this time the pilot stated he was sorry, that he meant to be level but got distracted.

Original NASA ASRS Text

Title: CGA LTT CLIMBED THROUGH AN OCCUPIED ALT, RESULTING IN LESS THAN STANDARD SEPARATION.

Narrative: CGA X AT FL370 REQUESTED FL410. THERE WAS PLENTY OF ROOM BTWN HIM AND CGA Y WBOUND AT FL390, SO I CLBED HIM. AFTER AWHILE IT BECAME APPARENT THAT CGA X WAS NOT GOING TO BE LEVEL IN TIME. AT THIS TIME THE ACFT WERE APPROX 3 MINS APART. I ASKED THE PLT IF HE COULD BE LEVEL IN A 1 1/2 MINS, AND HE REPLIED IN THE AFFIRMATIVE. I TURNED TO OTHER DUTIES AND WHEN I TURNED BACK, I NOTICED A SLOW RATE OF CLB. I ASKED THE PLT HIS RATE OF CLB AND HE SAID 600 FPM. I TURNED BOTH ACFT, BUT TOO LATE TO PREVENT THE SYS ERROR. AT THIS TIME THE PLT STATED HE WAS SORRY, THAT HE MEANT TO BE LEVEL BUT GOT DISTRACTED.

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.