Falcon 2000
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 90; Flight Crew Total 15000; Flight Crew Type 229
Aircraft Equipment Problem Critical; Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural Clearance
Flight Crew Returned To Clearance; Flight Crew Regained Aircraft Control; Flight Crew FLC Overrode Automation; Flight Crew Overcame Equipment Problem
Aircraft
While cruising at FL430; with the autopilot engaged on the left side; the aircraft began an abrupt climb. I saw a CCO (Cursor Control Device) failure on the EICAS message screen and looked at my altimeter which read 29.72 and was climbing thru 42;200 FT. I disengaged the autopilot and looked at the co-pilot's altimeter which now read 43;700 FT. ATC inquired what our altitude was as I started a descent back down to FL430 on the co-pilot altimeter. I engaged the autopilot on the right side and switched the CCO to the right side. We told ATC what happened and confirmed we were at FL430.
Falcon 2000 EASY aircraft began an abrupt climb from assigned altitude. Autoflight system malfunction was cited as contributor to the event.