S56 controller experienced operational error when issuing descent below minimum vectoring altitude.

Attributes
ACN	629169
Time
Date	200408
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : s56.tracon
State Reference	UT
Altitude	msl single value : 11300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : s56.tracon
Operator	general aviation : corporate
Make Model Name	Citation II S2/Bravo
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Route In Use	arrival star : n/s
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller military : 4 controller radar : 20 controller supervisory : 5 controller time certified in position1 : 8
ASRS Report	629169
Person 2
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Events
Anomaly	other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance flight crew : took evasive action
Consequence	faa : investigated
Supplementary
Problem Areas	ATC Human Performance Chart Or Publication Flight Crew Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

I observed aircraft descending through 11900 ft and advised aircraft to climb to 12000 ft. Aircraft got down to 11300 ft and climbed to 12000 ft. It was 11800 ft MVA. No other aircraft involved.

Original NASA ASRS Text

Title: S56 CTLR EXPERIENCED OPERROR WHEN ISSUING DSCNT BELOW MINIMUM VECTORING ALT.

Narrative: I OBSERVED ACFT DSNDING THROUGH 11900 FT AND ADVISED ACFT TO CLB TO 12000 FT. ACFT GOT DOWN TO 11300 FT AND CLBED TO 12000 FT. IT WAS 11800 FT MVA. NO OTHER ACFT INVOLVED.

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.