Cracked window shocked passengers on a LOT flight

A LOT Polish Airlines Boeing 787-8 performing flight LO-6 from Warsaw, Poland (WAW/EPWA) to JFK New York, USA (JFK/KJFK) was enroute at FL400 about 300nm northeast of New York when one of the passenger windows cracked. The aircraft rapidly descended to 10,000 feet, reaching 10,000 feet about 15 minutes later and continued to New York for a safe landing on runway 22L at 19.18 UTC.  

The airline reported the electrophotochromatic layer used to darken the window of the passenger window was damaged, the tightness of the window however was not impaired. The aircraft was dispatched for the return flight.

The window is going to be replaced in Warsaw the airline said.
Passengers in the affected row were relocated, the pilots declared an Emergency landing, and the flight landed safely without further incident. There were no injuries.
The aircraft remained on the ground in New York for about 5 hours, then departed for its next flight.

This was the second issue with windows on the LOT Dreamliners in one week. On Sunday, August 14th, a LOT Polish Airlines flight bound for Toronto was diverted due to a crack in the aircraft's windshield.

Aircraft Information:

Airline: LOT

Code: LO/LOT

Aircraft: Boeing 787-8

Registration: SP-LRA

Serial Number: 35938

Engines: 2 x RR Trent 1000

First Flew: 18/10/2012

Age: 9 Yrs 10 Mts