BE200 pilot reported an error in sequencing waypoints when loading arrivals into the G1000.

Attributes
ACN	1516630
Time
Date	201702
Local Time Of Day	1801-2400
Place
Locale Reference	LAS.Airport
State Reference	NV
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	Super King Air 200
Operating Under FAR Part	Part 135
Flight Phase	Initial Approach
Route In Use	STAR FUZZY8
Flight Plan	IFR
Component
Aircraft Component	Navigation Database
Person 1
Function	Check Pilot Captain Pilot Not Flying
Qualification	Flight Crew Flight Instructor Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 150 Flight Crew Total 16000 Flight Crew Type 11000
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy Deviation - Procedural Clearance Deviation - Track / Heading All Types

Narrative:

When a STAR is loaded into the garmin G1000; the system automatically loads the identifier for the airport immediately after the last fix published on the STAR; even though the airport is not part of the procedure. The last leg of the FUZZY8 (and the sunst arrival as well) lay out a track that is an extended south downwind leg that goes past the airport.these procedures call for a straight track from ipumy to bld. While executing the FUZZY8; our aircraft began an unauthorized turn back toward the airport shortly after passing ipumy rather than proceeding to bld for radar vectors to final. The G1000 apparently thought that las was part of the STAR and since the turn back to the airport from our portion required a 170-degree left turn; the turn-anticipation feature began the unauthorized turn almost immediately rather than proceeding to bld as depicted.

Original NASA ASRS Text

Title: BE200 pilot reported an error in sequencing waypoints when loading arrivals into the G1000.

Narrative: When a STAR is loaded into the Garmin G1000; the system automatically loads the identifier for the airport immediately after the last fix published on the STAR; even though the airport is not part of the procedure. The last leg of the FUZZY8 (and the SUNST arrival as well) lay out a track that is an extended south downwind leg that goes past the airport.These procedures call for a straight track from IPUMY to BLD. While executing the FUZZY8; our aircraft began an unauthorized turn back toward the airport shortly after passing IPUMY rather than proceeding to BLD for radar vectors to final. The G1000 apparently thought that LAS was part of the STAR and since the turn back to the airport from our portion required a 170-degree left turn; the turn-anticipation feature began the unauthorized turn almost immediately rather than proceeding to BLD as depicted.

Data retrieved from NASA's ASRS site 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.