A300
Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Weather / Turbulence; Inflight Event / Encounter Loss Of Aircraft Control
Flight Crew Regained Aircraft Control; Flight Crew FLC Overrode Automation
Weather
At FL340 aircraft encountered severe to extreme turbulence causing uncontrollable pitch; roll; and yaw. Captain disconnected the autopilot and regained control of the aircraft.Aircraft radar was not displaying convective activity; causing convective area penetration.Suggestions: Improved aircraft radar; onboard NEXRAD weather for strategic information; ATC communication of their NEXRAD along with dispatch NEXRAD information.
A300 First Officer reported encountering severe to extreme turbulence at FL340.