What was found
RUDDER FLUTTER IN FLIGHT AT 290 KNOTS, CAUSING LIGHT AIRFRAME VIBRATION, FLUTTER REDUCED WITH REDUCED AIRSPEED TO 250 KNOTS, FLUTTER REDUCED WITH RUDDER PEDAL PRESSURE. REMOVED AND REPLACED FLIGHT CONTROL COMPUTER (FCC) NR 2 IAW MM 22-12-14, OPS CHECK OK. (M)