Large transport TCASII TA from light transport.

Attributes
ACN	242333
Time
Date	199305
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : stl
State Reference	MO
Altitude	msl bound lower : 5000 msl bound upper : 6000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : stl tower : crp
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Navigation In Use	Other
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
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
ASRS Report	242333
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Miss Distance	horizontal : 18000 vertical : 1000
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

I was working departure south. The first departure was an large transport. I radar idented the aircraft and climbed him to 6000 ft. 1 mi in trail was light transport. I radar idented the light transport and noticed the light transport was outclbing the large transport so I climbed the light transport to 6000 ft. With 3 mi lateral separation I turned the large transport to 170 degrees to parstell the light transport. When the light transport was out of 5500 ft and the large transport was 4200 ft I turned the light transport to 120 degree heading and the large transport to 260 degree heading. When the large transport passed the light transport the light transport was at 6000 ft and the large transport was at 5000 ft. I gave the large transport traffic on the light transport and the pilot notified me that he received a TCASII alert.

Original NASA ASRS Text

Title: LGT TCASII TA FROM LTT.

Narrative: I WAS WORKING DEP S. THE FIRST DEP WAS AN LGT. I RADAR IDENTED THE ACFT AND CLBED HIM TO 6000 FT. 1 MI IN TRAIL WAS LTT. I RADAR IDENTED THE LTT AND NOTICED THE LTT WAS OUTCLBING THE LGT SO I CLBED THE LTT TO 6000 FT. WITH 3 MI LATERAL SEPARATION I TURNED THE LGT TO 170 DEGS TO PARSTELL THE LTT. WHEN THE LTT WAS OUT OF 5500 FT AND THE LGT WAS 4200 FT I TURNED THE LTT TO 120 DEG HDG AND THE LGT TO 260 DEG HDG. WHEN THE LGT PASSED THE LTT THE LTT WAS AT 6000 FT AND THE LGT WAS AT 5000 FT. I GAVE THE LGT TFC ON THE LTT AND THE PLT NOTIFIED ME THAT HE RECEIVED A TCASII ALERT.

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.