Pilot of unknown aircraft type fails to follow assigned track on jcobs arrival to geu.

Attributes
ACN	649430
Time
Date	200503
Place
Locale Reference	airport : geu.airport
State Reference	AZ
Altitude	msl single value : 11000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : p50.tracon
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Navigation In Use	other
Flight Phase	descent : approach
Route In Use	arrival star : jcobs two
Person 1
Qualification	pilot : multi engine pilot : instrument
Experience	flight time last 90 days : 23.1 flight time total : 4909 flight time type : 2658
ASRS Report	649430
Person 2
Affiliation	government : faa
Function	controller : approach
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance controller : issued advisory
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I filed and was cleared lbb; tx; direct geu; az; FL240. En route; ZAB amended flight plan direct corona VOR direct socorro VOR jcobs intersection direct geu. ZAB further amended jcobs intersection jcobs 2 arrival geu cross jcobs intersection at 11000 ft. I had entered the first amendment in the garmin 530 GPS flight plan. The second amendment I entered jcobs 2 arrival into flight plan. Upon crossing jcobs intersection; the garmin 530 said to turn to 190 degrees. (This 190 degree heading was direct to geu airport.) after the turn; I checked the STAR jcobs 2 arrival and saw I should have turned to 171 degrees. I then turned to 160 degrees to intercept the 171 degree radial jcobs 2 arrival. The time was less than 1 min. About 30 seconds after the turn; phx approach advised I was off course and to turn left to 150 degrees. Barely 15 seconds later; I was told to turn 090 degrees. Another min later; phx approach cleared me to geu airport direct. The problem was my not having complete understanding of the recently installed garmin 530 GPS.

Original NASA ASRS Text

Title: PLT OF UNKNOWN ACFT TYPE FAILS TO FOLLOW ASSIGNED TRACK ON JCOBS ARR TO GEU.

Narrative: I FILED AND WAS CLRED LBB; TX; DIRECT GEU; AZ; FL240. ENRTE; ZAB AMENDED FLT PLAN DIRECT CORONA VOR DIRECT SOCORRO VOR JCOBS INTXN DIRECT GEU. ZAB FURTHER AMENDED JCOBS INTXN JCOBS 2 ARR GEU CROSS JCOBS INTXN AT 11000 FT. I HAD ENTERED THE FIRST AMENDMENT IN THE GARMIN 530 GPS FLT PLAN. THE SECOND AMENDMENT I ENTERED JCOBS 2 ARR INTO FLT PLAN. UPON XING JCOBS INTXN; THE GARMIN 530 SAID TO TURN TO 190 DEGS. (THIS 190 DEG HDG WAS DIRECT TO GEU ARPT.) AFTER THE TURN; I CHKED THE STAR JCOBS 2 ARR AND SAW I SHOULD HAVE TURNED TO 171 DEGS. I THEN TURNED TO 160 DEGS TO INTERCEPT THE 171 DEG RADIAL JCOBS 2 ARR. THE TIME WAS LESS THAN 1 MIN. ABOUT 30 SECONDS AFTER THE TURN; PHX APCH ADVISED I WAS OFF COURSE AND TO TURN L TO 150 DEGS. BARELY 15 SECONDS LATER; I WAS TOLD TO TURN 090 DEGS. ANOTHER MIN LATER; PHX APCH CLRED ME TO GEU ARPT DIRECT. THE PROB WAS MY NOT HAVING COMPLETE UNDERSTANDING OF THE RECENTLY INSTALLED GARMIN 530 GPS.

Data retrieved from NASA's ASRS site as of January 2009 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.