Challenger CL600
Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine; Flight Crew Instrument
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Provided Assistance; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Diverted; General Flight Cancelled / Delayed; General Maintenance Action
Aircraft
On departure; aircraft failed to pressurize. Leveled off. Ran appropriate checklist from QRH. Unable to manually control pressurization. Returned to field.
Challenger CL600 First Officer reported unable to pressurize cabin and diverted to a precautionary landing.