Cle local and approach controllers described operational error at 3600 ft as departure is released and conflicts with traffic on descent to nearby airport.

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Attributes
ACN	673072
Time
Date	200509
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : cle.airport
State Reference	OH
Altitude	msl single value : 3600
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : cle.tracon tower : phl.tower
Operator	common carrier : air carrier
Make Model Name	EMB ERJ 145 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : cle.tracon
Operator	general aviation : corporate
Make Model Name	Falcon 50
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller radar : 16 flight time total : 500
ASRS Report	673072
Person 2
Affiliation	government : faa
Function	controller : approach
Experience	controller radar : 13
ASRS Report	673073
Events
Anomaly	conflict : airborne critical non adherence : required legal separation
Independent Detector	atc equipment : conflict alert other controllera other controllerb
Resolutory Action	controller : issued new clearance controller : issued alert flight crew : took evasive action
Consequence	faa : investigated
Miss Distance	horizontal : 6000 vertical : 100
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

I was working local when arrival coordinator requested with tower coordinator; lower for a falcon landing bkl. Tower coordinator asked me and told arrival coordinator unable. I launched the embraer on a 035 degree heading (towards bkl). After switching the embraer; I saw he was in conflict with the falcon who had descended into and towards bkl. I should have changed the E145's heading after I saw the falcon descending before switching to departure. Supplemental information from acn 673073: I was working departure and I had a 6000 ft inbound for bkl above tower's airspace which is 5000 ft. I thought the satellite controller apprequed lower with the tower; so I descended my traffic to 3000 ft and switched him to the satellite controller. Then; the tower launched a departure climbing right towards my traffic in his descent. To prevent this situation; don't assume anything!

Original NASA ASRS Text

Title: CLE LCL AND APCH CTLRS DESCRIBED OPERROR AT 3600 FT AS DEP IS RELEASED AND CONFLICTS WITH TFC ON DSCNT TO NEARBY ARPT.

Narrative: I WAS WORKING LCL WHEN ARR COORDINATOR REQUESTED WITH TWR COORDINATOR; LOWER FOR A FALCON LNDG BKL. TWR COORDINATOR ASKED ME AND TOLD ARR COORDINATOR UNABLE. I LAUNCHED THE EMBRAER ON A 035 DEG HDG (TOWARDS BKL). AFTER SWITCHING THE EMBRAER; I SAW HE WAS IN CONFLICT WITH THE FALCON WHO HAD DSNDED INTO AND TOWARDS BKL. I SHOULD HAVE CHANGED THE E145'S HDG AFTER I SAW THE FALCON DSNDING BEFORE SWITCHING TO DEP. SUPPLEMENTAL INFO FROM ACN 673073: I WAS WORKING DEP AND I HAD A 6000 FT INBOUND FOR BKL ABOVE TWR'S AIRSPACE WHICH IS 5000 FT. I THOUGHT THE SATELLITE CTLR APPREQUED LOWER WITH THE TWR; SO I DSNDED MY TFC TO 3000 FT AND SWITCHED HIM TO THE SATELLITE CTLR. THEN; THE TWR LAUNCHED A DEP CLBING RIGHT TOWARDS MY TFC IN HIS DSCNT. TO PREVENT THIS SIT; DON'T ASSUME ANYTHING!

Data retrieved from NASA's ASRS site as of January 2009 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.