B767-200
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Situational Awareness
Aircraft Equipment Problem Critical; Inflight Event / Encounter Weather / Turbulence
Air Traffic Control Provided Assistance; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Landed in Emergency Condition
Aircraft
Climbing out around FL340 avoiding thunderstorms. We received a master warning main cargo door and we also observed a loss of pressurization. We don the oxygen mask we established crew communications and we requested ATC assistance. We proceeded to descend to 10;000 ft. and ran the QRH at that time I took the controls. We made a choice to divert to ILN because of the thunderstorms. We landed on Runway 22R without a problem.
[Report narrative contained no additional information.]
Captain reported loss of pressurization during climb out; necessitating a precautionary landing.