<< >> NASA ASRS Report 649683, March 2005

Cvg approach controller experienced operational error at 4000 ft when air carrier failed to respond to vectors during parallel approach procedures.

Attributes
ACN	649683
Time
Date	200503
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : cvg.airport
State Reference	OH
Altitude	msl single value : 4000
Environment
Flight Conditions	Mixed
Weather Elements	Snow
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : cvg.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	arrival : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : cvg.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	arrival : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller radar : 20
ASRS Report	645683
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	atc equipment : conflict alert other controllera
Resolutory Action	controller : issued alert controller : issued new clearance flight crew : took evasive action
Consequence	faa : investigated
Miss Distance	horizontal : 10320
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

While vectoring to the ILS for final approach; air carrier X was told to descend to 3000 ft while air carrier Y was assigned 4000 ft. Air carrier Y was vectored to the runway 36R localizer; but did not respond to the issued vector. Air carrier X was established on the runway 36L localizer; but was slow in descending. When air carrier Y did not respond to the issued vector; a loss of separation occurred A000 ft on the parallel locs.

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Original NASA ASRS Text

Title: CVG APCH CTLR EXPERIENCED OPERROR AT 4000 FT WHEN ACR FAILED TO RESPOND TO VECTORS DURING PARALLEL APCH PROCS.

Narrative: WHILE VECTORING TO THE ILS FOR FINAL APCH; ACR X WAS TOLD TO DSND TO 3000 FT WHILE ACR Y WAS ASSIGNED 4000 FT. ACR Y WAS VECTORED TO THE RWY 36R LOC; BUT DID NOT RESPOND TO THE ISSUED VECTOR. ACR X WAS ESTABLISHED ON THE RWY 36L LOC; BUT WAS SLOW IN DSNDING. WHEN ACR Y DID NOT RESPOND TO THE ISSUED VECTOR; A LOSS OF SEPARATION OCCURRED A000 FT ON THE PARALLEL LOCS.

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.