Flight Crew Commercial; Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 90; Flight Crew Total 8000; Flight Crew Type 7000
Aircraft Equipment Problem Critical
Air Traffic Control Provided Assistance; Flight Crew Landed As Precaution; Flight Crew Diverted; Flight Crew Landed in Emergency Condition; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Regained Aircraft Control
Aircraft
At cruise FL230 I heard a loud crack and cabin depressurized. I donned oxygen mask and initiated an emergency descent. Passengers [notified] me that the left forward window was cracked. While descending; ATC called and I responded standby. I tuned 7700 on transponder and called ATC and notified him of [the situation] once I had aircraft stabilized in descent. I then diverted to ZZZ.
The cabin depressurized in a Mitsubishi MU-2B-60 in cruise due to a cracked window.