Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Flight Crew Last 90 Days 20; Flight Crew Total 7600; Flight Crew Type 700
Physiological - Other; Time Pressure; Troubleshooting
Aircraft Equipment Problem Less Severe; Flight Deck / Cabin / Aircraft Event Illness / Injury; Inflight Event / Encounter Weather / Turbulence
Air Traffic Control Provided Assistance; Flight Crew Diverted; Flight Crew Landed in Emergency Condition
Aircraft
The aircraft was cruising at flight level 430. The aircraft was about 2 hours into the flight and weighed approximately 33000 lbs and was in smooth air on top of the clouds. Both pilots felt the large cabin pressure change in their ears first and noticed the rapid cabin rate increase on the synoptic. The aircraft oxygen masks were donned and an emergency descent was initiated. The passenger oxygen masks were deployed and donned. The Cabin Altitude CAS (Crew Alerting System) was displayed. Air Traffic Control was notified; and the aircraft descended to 7000 feet while deviating around several thunderstorms. The CABIN ALTITUDE AND EMERGENCY DESCENT Checklists were completed during the descent. The highest cabin altitude was approximately 15000 ft. During the descent the following additional messages were posted; CABIN ALTITUDE; CHECK CABIN ALTITUDE; CHECK CABIN RATE; PRESSURE CMPTR FAIL. These messages were noted below 10000 feet.  ATC provided radar vectors to [nearest airport]. We had an uneventful landing. After landing one passenger mentioned discomfort in his ear.
The Captain of a corporate Falcon jet reported a loss of cabin pressurization while cruising at flight level 430. An emergency descent was accomplished and the aircraft was successfully diverted to a suitable enroute airport. The highest cabin altitude noted was 15;000 and one passenger reported some ear discomfort.