ZAU ARTCC controller allowed a D328 to overtake a B190 resulting in a loss of separation.

Attributes
ACN	551929
Time
Date	200206
Day	Tue
Place
Locale Reference	navaid : grb.vortac
State Reference	WI
Altitude	msl single value : 120
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zau.artcc
Operator	common carrier : air taxi
Make Model Name	Beech 1900
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zau.artcc
Operator	common carrier : air carrier
Make Model Name	Do 328 TP (Turboprop)
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Experience	controller limited radar : 13 controller non radar : 14 controller radar : 12 controller time certified in position1 : 12
ASRS Report	551929
Person 2
Affiliation	company : air taxi
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation other anomaly other
Independent Detector	atc equipment : conflict alert atc equipment other atc equipment : radar
Resolutory Action	flight crew : took evasive action none taken : anomaly accepted
Miss Distance	horizontal : 18000 vertical : 600
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

The B190 was climbed to 12000 ft when checked on the frequency. The dornier turboprop checked on from approach and was climbed to 130. The dornier over took the B190 causing an less than standard separation. Chronic understaffing in our area. A yrs worth of 6 day weeks has led to a rash of fatigue related errors, with no end in sight to our staffing plight.

Original NASA ASRS Text

Title: ZAU ARTCC CTLR ALLOWED A D328 TO OVERTAKE A B190 RESULTING IN A LOSS OF SEPARATION.

Narrative: THE B190 WAS CLIMBED TO 12000 FT WHEN CHKED ON THE FREQ. THE DORNIER TURBOPROP CHKED ON FROM APCH AND WAS CLIMBED TO 130. THE DORNIER OVER TOOK THE B190 CAUSING AN LTSS. CHRONIC UNDERSTAFFING IN OUR AREA. A YRS WORTH OF 6 DAY WKS HAS LED TO A RASH OF FATIGUE RELATED ERRORS, WITH NO END IN SIGHT TO OUR STAFFING PLIGHT.

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.