Flight Crew Air Transport Pilot (ATP); Flight Crew Flight Instructor; Flight Crew Multiengine; Flight Crew Instrument
Flight Crew Last 90 Days 30; Flight Crew Total 7800; Flight Crew Type 2500
Deviation - Altitude Excursion From Assigned Altitude; Deviation - Speed All Types; Inflight Event / Encounter Loss Of Aircraft Control; Inflight Event / Encounter Weather / Turbulence
Flight Crew Regained Aircraft Control
Environment - Non Weather Related
Cruising at 37;000 FT experienced severe to extreme clear air turbulence. We had 1;000 FT altitude loss; speed increased 30 KTS and aircraft banked 30-60 [degrees] to the left. Aircraft then gained 1;500 FT; airspeed decreased to 60-80 KTS with a violent roll to the right. Regained control of the aircraft and reestablished airspeed and altitude. ATC was notified. Once the aircraft was stable I went to the back to checkout the airplane and to re-stow all of the items that were thrown about the cabin.
Hawker 800XP pilot reported encountering extreme clear air turbulence at FL370 that resulted in temporary loss of control of the aircraft.