A cpr flight crew flying a G11 at FL410 near mem failed to track the course as cleared by ATC.

Attributes
ACN	487991
Time
Date	200010
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : mem.vortac
Altitude	msl single value : 41000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zme.artcc
Operator	general aviation : corporate
Make Model Name	Gulfstream II
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	cruise : level
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : first officer
Qualification	pilot : commercial pilot : cfi pilot : multi engine pilot : instrument
Experience	flight time last 90 days : 85 flight time total : 950 flight time type : 65
ASRS Report	487991
Person 2
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : atp
Experience	flight time last 90 days : 100 flight time total : 11000 flight time type : 2400
ASRS Report	487990
Events
Anomaly	non adherence : clearance non adherence : far other spatial deviation
Independent Detector	other controllerb
Resolutory Action	controller : provided flight assist flight crew : returned to intended or assigned course flight crew : became reoriented
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

While at FL410 cruise using GPS navigation (uncoupled from autoplt) and while assessing a possible navigation #2 interface problem with copilot HSI. Inadvertently flew west of direct routing from lufkin VOR (lfk) to rutland airport (rut). Contributing factor is 040 degree heading with wind shift from 280 degrees at 78 KTS to 255 degrees at 91 KTS.

Original NASA ASRS Text

Title: A CPR FLC FLYING A G11 AT FL410 NEAR MEM FAILED TO TRACK THE COURSE AS CLRED BY ATC.

Narrative: WHILE AT FL410 CRUISE USING GPS NAV (UNCOUPLED FROM AUTOPLT) AND WHILE ASSESSING A POSSIBLE NAV #2 INTERFACE PROB WITH COPLT HSI. INADVERTENTLY FLEW W OF DIRECT ROUTING FROM LUFKIN VOR (LFK) TO RUTLAND ARPT (RUT). CONTRIBUTING FACTOR IS 040 DEG HDG WITH WIND SHIFT FROM 280 DEGS AT 78 KTS TO 255 DEGS AT 91 KTS.

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.