Carj flight crew advised by ATC off course on RNAV SID from dfw.

Attributes
ACN	671472
Time
Date	200509
Local Time Of Day	1201 To 1800
Place
Locale Reference	intersection : cobug
State Reference	TX
Altitude	msl bound lower : 22000 msl bound upper : 23000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : d10.tracon
Operator	common carrier : air carrier
Make Model Name	Regional Jet 700 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude climbout : initial
Route In Use	departure sid : nobly
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 15000 flight time type : 300
ASRS Report	671472
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial
ASRS Report	671818
Events
Anomaly	aircraft equipment problem : critical non adherence : published procedure non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued advisory flight crew : returned to intended or assigned course
Supplementary
Problem Areas	ATC Human Performance Chart Or Publication Aircraft Flight Crew Human Performance
Primary Problem	Ambiguous
Air Traffic Incident	Pilot Deviation

Narrative:

Air carrier flight from dfw. VMC conditions. At some point after the nobly fix; ATC notified the crew that the aircraft was 5 mi off course. The crew responded that we show on course. ATC gave the crew a heading of 080 degrees and tells the crew to intercept the departure on that heading. The captain selected the heading mode and turned right to 080 degrees; then selects the navigation mode. Upon selection of navigation mode; the aircraft abruptly turned to the left. ATC calls again and states that he shows the aircraft on a 020 degree heading. The crew responded that the aircraft is intercepting. ATC issues the heading of 080 degrees and tells the crew to intercept the departure from that heading. The captain selects the heading mode and again turns right to 080 degrees. The aircraft rolls wings level and the captain then selects the navigation mode. The aircraft intercepts the departure and no further vectors were issued.

Original NASA ASRS Text

Title: CARJ FLT CREW ADVISED BY ATC OFF COURSE ON RNAV SID FROM DFW.

Narrative: ACR FLT FROM DFW. VMC CONDITIONS. AT SOME POINT AFTER THE NOBLY FIX; ATC NOTIFIED THE CREW THAT THE ACFT WAS 5 MI OFF COURSE. THE CREW RESPONDED THAT WE SHOW ON COURSE. ATC GAVE THE CREW A HDG OF 080 DEGS AND TELLS THE CREW TO INTERCEPT THE DEP ON THAT HDG. THE CAPT SELECTED THE HDG MODE AND TURNED RIGHT TO 080 DEGS; THEN SELECTS THE NAV MODE. UPON SELECTION OF NAV MODE; THE ACFT ABRUPTLY TURNED TO THE LEFT. ATC CALLS AGAIN AND STATES THAT HE SHOWS THE ACFT ON A 020 DEG HDG. THE CREW RESPONDED THAT THE ACFT IS INTERCEPTING. ATC ISSUES THE HDG OF 080 DEGS AND TELLS THE CREW TO INTERCEPT THE DEP FROM THAT HDG. THE CAPT SELECTS THE HDG MODE AND AGAIN TURNS RIGHT TO 080 DEGS. THE ACFT ROLLS WINGS LEVEL AND THE CAPT THEN SELECTS THE NAV MODE. THE ACFT INTERCEPTS THE DEP AND NO FURTHER VECTORS WERE ISSUED.

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.