Controller climbed air carrier large transport through altitude of overflying small transport, while trying to separate large transport from air carrier-medium large transport.

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Attributes
ACN	96854
Time
Date	198810
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : djb
State Reference	OH
Altitude	msl bound lower : 16300 msl bound upper : 17000
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	departure other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Route In Use	departure other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 5
ASRS Report	96854
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : developmental
Events
Anomaly	altitude deviation : overshoot conflict : airborne less severe non adherence : required legal separation
Independent Detector	atc equipment other atc equipment : unspecified other controllera
Resolutory Action	controller : issued new clearance none taken : insufficient time
Consequence	faa : investigated
Miss Distance	horizontal : 0 vertical : 700
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error
Situations
ATC Facility	procedure or policy : unspecified

Narrative:

Training was being conducted at the windsor radar position at cle ARTCC. I recognized a problem had developed between medium large transport X and large transport Y. Both aircraft were stopped at 15000' with medium large transport X out of 12000' for 15000'. I reassigned medium large transport X 14000'. At that time I saw large transport Y out of 16300' with small transport Z overhead at 17000' for 19000'. Corrective action was taken at that time. I believe the frequency and twin departure routes going eastbound out of dtw were contributing factors. The frequency 125.6 was on buec which had a delay of one second from the time the microphone is keyed until transmission will carry. The twin departure routes should be changed to one entering the windsor sector from dtw.

Original NASA ASRS Text

Title: CTLR CLIMBED ACR LGT THROUGH ALT OF OVERFLYING SMT, WHILE TRYING TO SEPARATE LGT FROM ACR-MLG.

Narrative: TRAINING WAS BEING CONDUCTED AT THE WINDSOR RADAR POSITION AT CLE ARTCC. I RECOGNIZED A PROBLEM HAD DEVELOPED BTWN MLG X AND LGT Y. BOTH ACFT WERE STOPPED AT 15000' WITH MLG X OUT OF 12000' FOR 15000'. I REASSIGNED MLG X 14000'. AT THAT TIME I SAW LGT Y OUT OF 16300' WITH SMT Z OVERHEAD AT 17000' FOR 19000'. CORRECTIVE ACTION WAS TAKEN AT THAT TIME. I BELIEVE THE FREQ AND TWIN DEP ROUTES GOING EBND OUT OF DTW WERE CONTRIBUTING FACTORS. THE FREQ 125.6 WAS ON BUEC WHICH HAD A DELAY OF ONE SECOND FROM THE TIME THE MIKE IS KEYED UNTIL XMISSION WILL CARRY. THE TWIN DEP ROUTES SHOULD BE CHANGED TO ONE ENTERING THE WINDSOR SECTOR FROM DTW.

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.