Narrative:

Incorrect FMS position caused wrong turn on departure out of atl. ATC quickly corrected with a different heading and altitude. No traffic conflicts were noted. FMS may not have been initialized properly causing position to be incorrect and shift. Once position was fixed by VOR; FMS was reinitialized without further trouble. Factors include fatigue and rushing for departure sequencing by tower. Course was shown on primary display but failed to show on secondary. FMS failed to update or updated incorrectly when (takeoff/go around) buttons were depressed. FMS is supposed to update position when pressed prior to takeoff roll. It was assumed and appeared that the FMS was correct until turn was started in wrong direction. PF corrected and ATC noticed incorrect course.

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Original NASA ASRS Text

Title: CRJ200 EXPERIENCES TRACK DEV ON DEP DUE TO INCORRECT FMS INITIALIZATION.

Narrative: INCORRECT FMS POS CAUSED WRONG TURN ON DEP OUT OF ATL. ATC QUICKLY CORRECTED WITH A DIFFERENT HDG AND ALT. NO TFC CONFLICTS WERE NOTED. FMS MAY NOT HAVE BEEN INITIALIZED PROPERLY CAUSING POS TO BE INCORRECT AND SHIFT. ONCE POS WAS FIXED BY VOR; FMS WAS REINITIALIZED WITHOUT FURTHER TROUBLE. FACTORS INCLUDE FATIGUE AND RUSHING FOR DEP SEQUENCING BY TWR. COURSE WAS SHOWN ON PRIMARY DISPLAY BUT FAILED TO SHOW ON SECONDARY. FMS FAILED TO UPDATE OR UPDATED INCORRECTLY WHEN (TKOF/GAR) BUTTONS WERE DEPRESSED. FMS IS SUPPOSED TO UPDATE POS WHEN PRESSED PRIOR TO TKOF ROLL. IT WAS ASSUMED AND APPEARED THAT THE FMS WAS CORRECT UNTIL TURN WAS STARTED IN WRONG DIRECTION. PF CORRECTED AND ATC NOTICED INCORRECT COURSE.

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.