Less than standard separation occurred between 2 aircraft just after handoff to adjacent facility.

Attributes
ACN	179458
Time
Date	199105
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : msn
State Reference	WI
Altitude	msl bound lower : 7000 msl bound upper : 7000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mke tracon : msn
Operator	general aviation : personal
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Experience	controller radar : 1
ASRS Report	179458
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	non adherence : published procedure non adherence : required legal separation
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	Other
Miss Distance	horizontal : 9000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

I am a controller at msn ATCT. I handed off an aircraft to mke approach at 7000'. Mke had another aircraft in their airspace at 7000'. They came within 1 1/2 mi of each other at 7000'. I believe that if mke approach would have descended the other aircraft or turned it, there would not have been an operational error.

Original NASA ASRS Text

Title: LESS THAN STANDARD SEPARATION OCCURRED BETWEEN 2 ACFT JUST AFTER HANDOFF TO ADJACENT FAC.

Narrative: I AM A CTLR AT MSN ATCT. I HANDED OFF AN ACFT TO MKE APCH AT 7000'. MKE HAD ANOTHER ACFT IN THEIR AIRSPACE AT 7000'. THEY CAME WITHIN 1 1/2 MI OF EACH OTHER AT 7000'. I BELIEVE THAT IF MKE APCH WOULD HAVE DSNDED THE OTHER ACFT OR TURNED IT, THERE WOULD NOT HAVE BEEN AN OPERROR.

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.