Light transport overtaking climbing small transport and less than standard separation occurred.

Attributes
ACN	197276
Time
Date	199112
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : rid
State Reference	IN
Altitude	msl bound lower : 16000 msl bound upper : 16500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zid
Operator	common carrier : air carrier
Make Model Name	Small Transport, Low Wing, 2 Turboprop Eng
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar pilot : cfi pilot : instrument pilot : commercial
Experience	controller military : 10 controller non radar : 3 controller radar : 6 controller supervisory : 7 flight time last 90 days : 2 flight time total : 600
ASRS Report	197276
Person 2
Affiliation	government : faa
Function	oversight : supervisor
Qualification	controller : radar
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Miss Distance	horizontal : 9000 vertical : 500
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Small transport X departed cbg and was climbed to 17000 on a 015 degree heading. Light transport Y also departed cbg and was climbed to 16000 and given direct mie then sbn. Small transport X climbed very slowly and light transport Y climbed and leveled and accelerated. Cvg departs all aircraft on the same heading. The overtake was brought to my attention by my supervisor. I initiated turns, but the frequency was so congested that many clrncs were blocked and had to be repeated adding to more confusion. It appeared that neither aircraft turned. I did expedite small transport X up to 17000. I had recently relieved another training controller as it started to increase. I could not complete the necessary actions to prevent the occurrence due to the frequencys.

Original NASA ASRS Text

Title: LTT OVERTAKING CLBING SMT AND LTSS OCCURRED.

Narrative: SMT X DEPARTED CBG AND WAS CLBED TO 17000 ON A 015 DEG HDG. LTT Y ALSO DEPARTED CBG AND WAS CLBED TO 16000 AND GIVEN DIRECT MIE THEN SBN. SMT X CLBED VERY SLOWLY AND LTT Y CLBED AND LEVELED AND ACCELERATED. CVG DEPARTS ALL ACFT ON THE SAME HDG. THE OVERTAKE WAS BROUGHT TO MY ATTN BY MY SUPVR. I INITIATED TURNS, BUT THE FREQ WAS SO CONGESTED THAT MANY CLRNCS WERE BLOCKED AND HAD TO BE REPEATED ADDING TO MORE CONFUSION. IT APPEARED THAT NEITHER ACFT TURNED. I DID EXPEDITE SMT X UP TO 17000. I HAD RECENTLY RELIEVED ANOTHER TRAINING CTLR AS IT STARTED TO INCREASE. I COULD NOT COMPLETE THE NECESSARY ACTIONS TO PREVENT THE OCCURRENCE DUE TO THE FREQS.

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.