B737 Next Generation Undifferentiated
Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Flight Crew Last 90 Days 164; Flight Crew Total 6225; Flight Crew Type 6225
Troubleshooting
Aircraft Equipment Problem Critical; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Air Traffic Control Issued New Clearance; Air Traffic Control Provided Assistance; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Landed in Emergency Condition; Flight Crew Diverted
Aircraft
Just prior to Top of Descent; I noticed on the top center left area of window L1; a bright glowing light that intensified into arcing and would appear to emit a flame or spark. I asked the First Officer to get the fire extinguisher ready and I donned my oxygen mask. Shortly thereafter; the window popped and shattered. I called for the window overheat QRH and [advised ATC]. After the situation stabilized; we advised ATC that no assistance was required and briefed the Flight Attendants; Dispatch; and Airport Operations.
[Report narrative contained no additional information.]
B737 flight crew reported a flight deck window failed; resulting in a diversion.