Narrative:

While sitting at gate we completed the acceptance checklist; the before start checklist and the start checklist to the line. At the time all trim indications were green and appeared to be centered. We started the engines after being pushed back and taxied out to runway 35 at intersection kilo for take off. We ran the before takeoff checklist. Upon receiving our takeoff clearance we turned onto the runway and did the takeoff checklist. All indications were still normal. We had a takeoff configuration ok advisory message and all the trims were still green. We proceeded with the takeoff and at around 90 KTS we received a triple chime and an aural warning for the rudder trim. We aborted and cleared the runway. Then I contacted dispatch and was told to go to the gate to meet with maintenance.after clearing the runway after the abort I looked down at the trim it still looked centered from my seat with the cockpit lighting set for the night flight we were about to depart on. It wasn't until turning the lights up and leaning way out directly behind center pedestal that you could see that the rudder was just barely off of centered. Even after the abort the rudder was still indicating green. I think this a fairly serious aircraft issue that should be looked into closer by the manufacturer. It should not indicate that everything is ok for departure and then at 90KTS or later decide that it is not. 35 from kilo in ZZZ is not a real long runway and I would have hated for this message to have popped up much later than it did; we might not have been able to stay on the runway at a much faster speed.

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Original NASA ASRS Text

Title: Despite repeated checks of the trim indices during flight preparation and checklists; the flight crew of a CRJ-200 received a takeoff configuration warning for excessive rudder trim and performed a high speed abort on short runway.

Narrative: While sitting at gate we completed the Acceptance Checklist; the Before Start Checklist and the Start Checklist to the line. At the time all trim indications were green and appeared to be centered. We started the engines after being pushed back and taxied out to Runway 35 at intersection Kilo for take off. We ran the before takeoff checklist. Upon receiving our takeoff clearance we turned onto the runway and did the Takeoff checklist. All indications were still normal. We had a TAKEOFF CONFIG OK advisory message and all the trims were still green. We proceeded with the takeoff and at around 90 KTS we received a triple chime and an aural warning for the rudder trim. We aborted and cleared the runway. Then I contacted Dispatch and was told to go to the gate to meet with Maintenance.After clearing the runway after the abort I looked down at the trim it still looked centered from my seat with the cockpit lighting set for the night flight we were about to depart on. It wasn't until turning the lights up and leaning way out directly behind center pedestal that you could see that the rudder was just barely off of centered. Even after the abort the rudder was still indicating green. I think this a fairly serious aircraft issue that should be looked into closer by the manufacturer. It should not indicate that everything is OK for departure and then at 90KTS or later decide that it is not. 35 from Kilo in ZZZ is not a real long runway and I would have hated for this message to have popped up much later than it did; we might not have been able to stay on the runway at a much faster speed.

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.