Learjet 60 first officer reported pressurization system failure shortly after takeoff.

Attributes
ACN	1679429
Time
Date	201908
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Make Model Name	Learjet 60
Operating Under FAR Part	Part 91
Flight Phase	Initial Climb
Route In Use	Vectors
Flight Plan	IFR
Component
Aircraft Component	Pressurization System
Person 1
Function	First Officer
Qualification	Flight Crew Multiengine Flight Crew Commercial
Experience	Flight Crew Last 90 Days 201 Flight Crew Total 5983 Flight Crew Type 56
Events
Anomaly	Aircraft Equipment Problem Critical Flight Deck / Cabin / Aircraft Event Other / Unknown Inflight Event / Encounter Other / Unknown

Narrative:

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.

Original NASA ASRS Text

Title: Learjet 60 First Officer reported pressurization system failure shortly after takeoff.

Narrative: 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.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.