Regional Jet 200 ER/LR (CRJ200)
Training / Qualification; Workload
Aircraft Equipment Problem Critical; Inflight Event / Encounter Loss Of Aircraft Control
Flight Crew FLC Overrode Automation; Flight Crew Took Evasive Action; Flight Crew Regained Aircraft Control; Flight Crew FLC complied w / Automation / Advisory; General Declared Emergency
Aircraft
About 20 miles from our destination [an] AP TRIM IS LWD caution message was posted. In accordance with the QRH the First Officer/pilot flying disconnected the autopilot and noted that roll control was very difficult. The aileron trim was found to be not working. I was in the QRH when I heard a loud snap and the aircraft rolled to the right. The autopilot was not engaged and the First Officer was able to stop the roll. We declared an emergency and headed straight to [Runway] 30L. Aircraft control was a bit better after the 'snap' but still very difficult. Although control was difficult we were still flying and there would be no 'troubleshooting.' We landed safely.
A CRJ-200 CAS alerted AP TRIM IS LWD and while complying with the QRH the Aileron Trim was found inoperative. Following a loud snap the aircraft rolled right but was then recovered so an emergency was declared and with a binding aileron flown to the destination.