Supervisor controller vectoring aircraft for spacing on ILS had less than standard separation.

Attributes
ACN	259193
Time
Date	199312
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ric
State Reference	VA
Altitude	msl bound lower : 2000 msl bound upper : 2000
Environment
Flight Conditions	IMC
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : ric
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	descent : approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	descent : approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach oversight : supervisor
Qualification	controller : radar
Experience	controller radar : 25 controller supervisory : 12
ASRS Report	259193
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	other controllera
Resolutory Action	other
Consequence	Other
Miss Distance	horizontal : 12000 vertical : 300
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

2 aircraft on vectors for ILS approach to runway 34. First aircraft vectored across localizer for spacing. Second aircraft following descended to 2000 ft. First aircraft turned to intercept localizer and descended to 2000 ft. Second aircraft on vectors to localizer. First aircraft tag went into coast and was overlapped with another overflt. Controller's attention diverted for a moment. When looked again first aircraft reacquired on localizer and second aircraft speed had increased due to northeast wind at 50 KTS. Controller turned #2 aircraft but strong wind caused aircraft to drift southwest and separation was lost.

Original NASA ASRS Text

Title: SUPVR CTLR VECTORING ACFT FOR SPACING ON ILS HAD LTSS.

Narrative: 2 ACFT ON VECTORS FOR ILS APCH TO RWY 34. FIRST ACFT VECTORED ACROSS LOC FOR SPACING. SECOND ACFT FOLLOWING DSNDED TO 2000 FT. FIRST ACFT TURNED TO INTERCEPT LOC AND DSNDED TO 2000 FT. SECOND ACFT ON VECTORS TO LOC. FIRST ACFT TAG WENT INTO COAST AND WAS OVERLAPPED WITH ANOTHER OVERFLT. CTLR'S ATTN DIVERTED FOR A MOMENT. WHEN LOOKED AGAIN FIRST ACFT REACQUIRED ON LOC AND SECOND ACFT SPD HAD INCREASED DUE TO NE WIND AT 50 KTS. CTLR TURNED #2 ACFT BUT STRONG WIND CAUSED ACFT TO DRIFT SW AND SEPARATION WAS LOST.

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.