After inspecting the window, the crew made a call to return to Stansted Airport just 36 minutes after departure. Nine passengers and 11 crew were on board at the time. Fortunately, the cabin pressure was not impacted by the window damage, the AAIB bulletin stated.
It was only after landing and disembarking that the crew discovered the full extent of the damage, which included a missing window pane.
The damage was reportedly caused during a filming event on October 3. During the event, which lasted between four and five-and-a-half hours, high-powered lights were used, which caused “sustained thermal damage and distortion”, the AAIB bulletin read.
“External lights had been shone through the cabin windows to give the illusion of a sunrise,” it added.
AAIB plans to continue investigating the incident so they can better understand how it happened and how to avoid it.
“Work is ongoing with the aircraft manufacturer and operator to fully understand the properties of the lights used and how this risk can be managed in future,” the bulletin stated.
It urged aircraft owners and operators to consider the hazard posed by activities so they could minimise the risk of damage to aircraft.