A ce-650 FMS malfunctioned resulting in the aircraft not following the STAR.

Attributes
ACN	520690
Time
Date	200108
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : vny.airport
State Reference	CA
Altitude	msl single value : 30000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : hou&.tower
Operator	general aviation : corporate
Make Model Name	Citation III, VI, VII
Flight Phase	descent : approach descent : intermediate altitude
Route In Use	arrival star : fernando 5
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : atp pilot : commercial pilot : multi engine
Experience	flight time last 90 days : 25 flight time total : 6250 flight time type : 170
ASRS Report	520690
Events
Anomaly	aircraft equipment problem : less severe non adherence : clearance other anomaly other other spatial deviation
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Aircraft

Narrative:

Test flight on GPWS. However, #1 FMS went wacky -- sent us away from STAR.

Original NASA ASRS Text

Title: A CE-650 FMS MALFUNCTIONED RESULTING IN THE ACFT NOT FOLLOWING THE STAR.

Narrative: TEST FLT ON GPWS. HOWEVER, #1 FMS WENT WACKY -- SENT US AWAY FROM STAR.

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.