Source: AvHerald
A Lufthansa Airbus A380-800, registration D-AIMI performing flight LH-440 from Frankfurt/Main (Germany) to Houston Intercontinental,TX (USA), was enroute at FL380 near Montreal,QC (Canada) when smoke and fire broke out in the cabin of the aircraft, which was extinguished by cabin crew.

A passenger in the aft cabin reported the aircraft was enroute near Montreal when a fire alarm triggered and smoke developed. The captain announced a short circuit had triggered a fire in the cabin. The passenger reported everything except the exit signs went dark, only sirens could be heard. Obviously vents were opened, an air rush exiting the cabin could be felt. Flight attendants battled the fire with fire extinguishers. After the fire was out the captain announced, that there had been no damage to the aircraft, and they were able to continue to the destination.