<< >> NASA ASRS Report 630836, September 2004

Cvg approach controller experiences loss of separation during TCAS event with level and climbing aircraft at 8000 ft and 9000 ft.

Attributes
ACN	630836
Time
Date	200409
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : cvg.vortac
State Reference	KY
Altitude	msl single value : 9000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : cvg.tracon
Operator	common carrier : air carrier
Make Model Name	Do 328 TJ (Turbojet)
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : cvg.tracon
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller radar : 17 controller time certified in position1 : 13 flight time total : 550
ASRS Report	630836
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	aircraft equipment : tcas other controllera
Resolutory Action	controller : issued advisory flight crew : took evasive action
Consequence	faa : investigated
Miss Distance	horizontal : 3000 vertical : 600
Supplementary
Problem Areas	FAA Aircraft
Primary Problem	FAA

Narrative:

DO328 descended and just leveled at 9000 ft. MD80 was a departure climbing to and just about to level at 8000 ft. DO328 advised 'responding to RA.' I issued traffic 10 O'clock position, 2 mi, leveling 8000 ft eastbound. The DO328 descended toward the traffic then leveled above traffic. Mode C showed DO328 at 8600 ft pilot advised 8800 ft.

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Original NASA ASRS Text

Title: CVG APCH CTLR EXPERIENCES LOSS OF SEPARATION DURING TCAS EVENT WITH LEVEL AND CLBING ACFT AT 8000 FT AND 9000 FT.

Narrative: DO328 DSNDED AND JUST LEVELED AT 9000 FT. MD80 WAS A DEP CLBING TO AND JUST ABOUT TO LEVEL AT 8000 FT. DO328 ADVISED 'RESPONDING TO RA.' I ISSUED TFC 10 O'CLOCK POS, 2 MI, LEVELING 8000 FT EBOUND. THE DO328 DSNDED TOWARD THE TFC THEN LEVELED ABOVE TFC. MODE C SHOWED DO328 AT 8600 FT PLT ADVISED 8800 FT.

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.