Clt approach controller experienced operational error at 1800 ft when visual approach aircraft did not see preceding aircraft and separation was lost.

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Attributes
ACN	687941
Time
Date	200602
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : clt.vortac
State Reference	NC
Altitude	msl single value : 1800
Environment
Flight Conditions	VMC
Light	Dawn
Aircraft 1
Controlling Facilities	tracon : clt.tracon
Operator	common carrier : air carrier
Make Model Name	De Havilland Canada Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : clt.tracon
Operator	common carrier : air carrier
Make Model Name	Regional Jet 200 ER&LR
Operating Under FAR Part	Part 121
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 : 6 controller time certified in position1 : 2
ASRS Report	687941
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	other controllera
Resolutory Action	none taken : anomaly accepted
Consequence	faa : investigated
Miss Distance	horizontal : 15000 vertical : 900
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Aircraft #1 cleared for a visual approach and switched to tower. Pilot acknowledges frequency change. Aircraft #2 does not see aircraft #1 so he is issued a visual approach clearance to airport. Aircraft #1 does not call the tower until 1 min and 40 seconds later. At 1 min and 15 seconds after frequency change was issued to aircraft #1; separation was lost. If aircraft #1 had contacted the tower in a reasonable time the tower could have provided visual separation.

Original NASA ASRS Text

Title: CLT APCH CTLR EXPERIENCED OPERROR AT 1800 FT WHEN VISUAL APCH ACFT DID NOT SEE PRECEDING ACFT AND SEPARATION WAS LOST.

Narrative: ACFT #1 CLRED FOR A VISUAL APCH AND SWITCHED TO TWR. PLT ACKNOWLEDGES FREQ CHANGE. ACFT #2 DOES NOT SEE ACFT #1 SO HE IS ISSUED A VISUAL APCH CLRNC TO ARPT. ACFT #1 DOES NOT CALL THE TWR UNTIL 1 MIN AND 40 SECONDS LATER. AT 1 MIN AND 15 SECONDS AFTER FREQ CHANGE WAS ISSUED TO ACFT #1; SEPARATION WAS LOST. IF ACFT #1 HAD CONTACTED THE TWR IN A REASONABLE TIME THE TWR COULD HAVE PROVIDED VISUAL SEPARATION.

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.