While being vectored, small transport does not fly the track desired by ATC.

Attributes
ACN	162678
Time
Date	199011
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : rdu
State Reference	NC
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : rdu
Operator	common carrier : air carrier
Make Model Name	Small Transport
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 4500 flight time type : 2800
ASRS Report	162678
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : less severe non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were being vectored for a visibility approach at rdu. It became apparent that the headings that issued and subsequently flown were not producing the desired ground track. Due to the high vol of traffic we were taken out of the sequence and then later landed. I then had a chat via phone with the controller and discussed the situation. Based on all the information that I had received, I had maintenance check out the aircraft. They found the dg's to be off somewhat in area of degrees that we were flying. This coupled with the fact that there was a strong wind out of the west may have caused us to track improperly.

Original NASA ASRS Text

Title: WHILE BEING VECTORED, SMT DOES NOT FLY THE TRACK DESIRED BY ATC.

Narrative: WE WERE BEING VECTORED FOR A VIS APCH AT RDU. IT BECAME APPARENT THAT THE HDGS THAT ISSUED AND SUBSEQUENTLY FLOWN WERE NOT PRODUCING THE DESIRED GND TRACK. DUE TO THE HIGH VOL OF TFC WE WERE TAKEN OUT OF THE SEQUENCE AND THEN LATER LANDED. I THEN HAD A CHAT VIA PHONE WITH THE CTLR AND DISCUSSED THE SITUATION. BASED ON ALL THE INFO THAT I HAD RECEIVED, I HAD MAINT CHK OUT THE ACFT. THEY FOUND THE DG'S TO BE OFF SOMEWHAT IN AREA OF DEGREES THAT WE WERE FLYING. THIS COUPLED WITH THE FACT THAT THERE WAS A STRONG WIND OUT OF THE W MAY HAVE CAUSED US TO TRACK IMPROPERLY.

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.