Crj-200 first officer reported rejecting the takeoff and returning to the gate after experiencing di...

Narrative:

When I added thrust for takeoff; I noticed a strong pull of the aircraft to the right. I had to apply and hold nearly 80-90% left rudder travel to maintain centerline. The wind was variable at 3; and when I checked the trust; the engines were matched. I mentioned the large amount of left rudder to the captain and he called to continue; suspecting it would correct itself. I brought the thrust up to about 80% at that time then the swerve changed to the left needing about half of the right rudder travel to stay on centerline. The captain called and accomplished abort; during which we got a brief 'config spoilers' warning message. The captain immediately checked the spoiler lever and they were already completely retracted and never out of the 0 detent. We exited the runway and contacted maintenance; returning to the gate.I am not sure what cause the aircraft to swerve; but after the abort with the 'config spoilers' message and later on after maintenance had checked the airplane; there was a 'right flight spoilers' caution message that briefly came up on the EICAS.for a moment due to the large rudder required; I stopped moving the levers forward and looked that they were matched about 40% N1. Possibly could have reduced thrust back to idle for a moment to check the directional control of my rudders; then reapplied thrust after; but it's not a real long runway anyway; I think we handled it well by aborting at a lower speed.

Original NASA ASRS Text

Title: CRJ-200 First Officer reported rejecting the takeoff and returning to the gate after experiencing directional control issues early in the takeoff roll.

Narrative: When I added thrust for takeoff; I noticed a strong pull of the aircraft to the right. I had to apply and hold nearly 80-90% left rudder travel to maintain centerline. The wind was variable at 3; and when I checked the trust; the engines were matched. I mentioned the large amount of left rudder to the Captain and he called to continue; suspecting it would correct itself. I brought the thrust up to about 80% at that time then the swerve changed to the left needing about half of the right rudder travel to stay on centerline. The Captain called and accomplished abort; during which we got a brief 'config spoilers' warning message. The Captain immediately checked the spoiler lever and they were already completely retracted and never out of the 0 detent. We exited the runway and contacted maintenance; returning to the gate.I am not sure what cause the aircraft to swerve; but after the abort with the 'config spoilers' message and later on after maintenance had checked the airplane; there was a 'R FLT SPOILERS' caution message that briefly came up on the EICAS.For a moment due to the large rudder required; I stopped moving the levers forward and looked that they were matched about 40% N1. Possibly could have reduced thrust back to idle for a moment to check the directional control of my rudders; then reapplied thrust after; but it's not a real long runway anyway; I think we handled it well by aborting at a lower speed.

Data retrieved from NASA's ASRS site 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.

Attributes
ACN	1479998
Time
Date	201709
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
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
Flight Plan	IFR
Person 1
Function	Pilot Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe Ground Event / Encounter Other / Unknown

Crj-200 first officer reported rejecting the takeoff and returning to the gate after experiencing directional control issues early in the takeoff roll.