An Air Canada Boeing 787-900, registration C-FRTU performing flight AC-848 from Toronto,ON (Canada) to London Heathrow,EN (UK) with 298 passengers and 10 crew, was en route at FL290 near Quebec City,QC (Canada) when a passenger dropped his eReader down into the seat mechanism and subsequently moved the seat which damaged the eReader. The battery overheated and the case started to melt, smoke emanated from the device. Cabin crew using 2 smoke hoods and 2 portable fire extinguishers were able to control the fire until they retrieved the device from the seat mechanism and placed the device in a Portable Electronic Device Fire Bag. The flight was able to continue to destination.
The Canadian TSB reported maintenance replaced the seat cover as well as all emergency equipment used.