A CRJ200 flight crew deviated from their atl SID when the autopilot failed to capture the FMS course...

Attributes
ACN	838411
Time
Date	200906
Local Time Of Day	1801-2400
Place
Locale Reference	ATL.Airport
State Reference	GA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Regional Jet 200 ER/LR (CRJ200)
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Route In Use	SID THRSR
Flight Plan	IFR
Component
Aircraft Component	FMS/FMC
Person 1
Function	First Officer Pilot Flying
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy Deviation - Procedural Clearance Deviation - Track / Heading All Types

Narrative:

Departed 9L in atl on the thrsr five departure using 'RNAV off the ground' procedures. Speed mode and navigation mode were selected and autopilot was engaged. Autopilot did not follow the FMS course; but stayed on runway heading. Pilot flying disengaged autopilot and returned to the correct course. ATC commented on the late turn but stated no traffic conflicts resulted from the deviation. No further issues.

Original NASA ASRS Text

Title: A CRJ200 flight crew deviated from their ATL SID when the autopilot failed to capture the FMS course.

Narrative: Departed 9L in ATL on the THRSR FIVE departure using 'RNAV off the ground' procedures. Speed mode and NAV mode were selected and autopilot was engaged. Autopilot did not follow the FMS course; but stayed on runway heading. Pilot flying disengaged autopilot and returned to the correct course. ATC commented on the late turn but stated no traffic conflicts resulted from the deviation. No further issues.

Data retrieved from NASA's ASRS site as of April 2012 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.