Regional Jet 900 (CRJ900)
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 150; Flight Crew Total 9300; Flight Crew Type 7700
Aircraft Equipment Problem Critical
Flight Crew Rejected Takeoff; General Flight Cancelled / Delayed; General Maintenance Action
Aircraft
Normal taxi out and line up on runway. Normal takeoff roll up to 100 KTS call. At same time or just after 100 KTS call; EICAS ED1 displayed 'IB SPOILERS' and 'IB FLT SPOILERS' caution messages accompanied by 'Caution chime'. Captain called 'abort' and I notified ATC of abort. We turned off at Taxiway C. Held position while Captain notified passengers and flight attendants of situation and to remain seated. Coordinated return to gate with ground control and company.Maintenance personnel ran tests and determined the PCU was bad and needed to be replaced.
During the takeoff roll just at 100 KTS call; 'IB SPOILERS' and 'IB SPOILERONS' message appeared. Message was evaluated and because of an unusual control feel (right wing spoiler was in the uncommanded full up position) an abort was accomplished. ATC; Flight Attendant; and passengers were advised and we returned to the gate. After seven hours; flight was canceled (passengers had been rerouted shortly after return to gate). Maintenance was able to duplicate the problem and I made 2 write ups; one for the messages and another for the high speed abort inspection. Maintenance determined a PCU problem and replaced the PCU for the fix.
CRJ900 flight crew received an EICAS caution message for 'IB SPOILERS' and 'IB FLT SPOILERS' at 100 KTS during takeoff and rejects. The roll control PCU was found to be jammed with the right wing inboard spoiler in the uncommanded full up position.