Learjet 60
Flight Crew Multiengine; Flight Crew Commercial
Flight Crew Last 90 Days 201; Flight Crew Total 5983; Flight Crew Type 56
Workload; Troubleshooting
Aircraft Equipment Problem Critical; Flight Deck / Cabin / Aircraft Event Other / Unknown; Inflight Event / Encounter Other / Unknown
Air Traffic Control Provided Assistance; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Diverted; Flight Crew Overcame Equipment Problem
Aircraft
Runup/taxi checks were normal. Departed with Panel clear - normalAt 6300 feet with heard a loud bang in the back of the cabin.My PIC leveled off and pulled the power back to 200 kts. We noticed the Emer Press (red master caution) light was illuminated.We descended to 6000 and told ATC we were diverting to ZZZ.ATC provided new routing. I ran the Emergency Pressurization checklist. Isolated the emergency as per the Emer Press checklist.From this point the flight was conducted normally (panel clear) with a successful landing at ZZZ to a full stop.
Learjet 60 First Officer reported pressurization system failure shortly after takeoff.