Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Critical
Flight Crew Diverted; Flight Crew Landed As Precaution; General Declared Emergency; General Maintenance Action
Aircraft
In cruise flight at FL350; we heard a loud thump/bang from the rear of the cabin. At this point we had a rapid decompression (2000 fpm plus). Proper checklists were followed to include an emergency descent. Passenger masks were manually deployed. Diverted to ZZZZ and had an overweight landing of 23;700 lbs. No damage was noted to exterior of aircraft upon landing.
At FL350 we heard a loud thump from rear of cabin. Noticed cabin climbing at 2;000 fpm. Complied with memory actions: Donned oxygen masks and selected oxy mic. Notified ATC of pressurization issue and that we were commencing an emergency descent. Declared an emergency. Manually deployed cabin oxygen masks. Ran the emergency checklist. Diverted to ZZZZ. Landed overweight.
HS125 flight crew experiences a loud thump from the rear of the cabin and a sudden loss of cabin pressurization. An emergency descent is initiated and the flight diverts to a suitable airport.