Learjet 31
Flight Crew Air Transport Pilot (ATP)
Deviation - Altitude Excursion From Assigned Altitude; Deviation - Speed All Types; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter Loss Of Aircraft Control; Inflight Event / Encounter Weather / Turbulence
Flight Crew Regained Aircraft Control
Weather
Cruise phase of flight. 45;000 feet experienced Clear Air Turbulence. Aircraft began to pitch and roll uncontrollably. Airspeed fluctuations +/- 10-20 knots. Loss of altitude was approximately 800 feet. Regained positive control of aircraft after reaching 44;200 feet. No Passengers were on board; no damage to aircraft was done. ATC was immediately notified of occurrence and was issued a descent to 41;000 feet. Incident lasted approximately 15 seconds.
[Report narrative contained no additional information.]
LJ31 flight crew reported encountering clear air turbulence and loss of aircraft control at FL450 with an altitude loss of 800 feet.