<< >> NASA ASRS Report 350884, October 1996

Approach controller used wrong call sign while vectoring a B737 to intercept the localizer final approach course and the aircraft overshot the final approach and had less than standard separation from a DO328 on a vector to follow the B737.

Attributes
ACN	350884
Time
Date	199610
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : pit
State Reference	PA
Altitude	msl bound lower : 4000 msl bound upper : 4000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : pit
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	descent : approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
ASRS Report	350884
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation other anomaly other
Independent Detector	other controllera
Resolutory Action	other
Consequence	Other
Miss Distance	horizontal : 12000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Air carrier B737 on base leg from north. Air carrier DO328 on modified base leg from south to follow the B737. B737 had similar call sign with previous aircraft and controller used wrong call sign, this resulted in loss of appropriate separation since the B737 never took turn to final and crossed localizer.

Related reports:

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• Approach controller reported vectoring an aircraft off the f...

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Original NASA ASRS Text

Title: APCH CTLR USED WRONG CALL SIGN WHILE VECTORING A B737 TO INTERCEPT THE LOC FINAL APCH COURSE AND THE ACFT OVERSHOT THE FINAL APCH AND HAD LTSS FROM A DO328 ON A VECTOR TO FOLLOW THE B737.

Narrative: ACR B737 ON BASE LEG FROM N. ACR DO328 ON MODIFIED BASE LEG FROM S TO FOLLOW THE B737. B737 HAD SIMILAR CALL SIGN WITH PREVIOUS ACFT AND CTLR USED WRONG CALL SIGN, THIS RESULTED IN LOSS OF APPROPRIATE SEPARATION SINCE THE B737 NEVER TOOK TURN TO FINAL AND CROSSED LOC.

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.