B757 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 163; Flight Crew Type 1236
Aircraft Equipment Problem Less Severe; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Flight Crew Overcame Equipment Problem
Aircraft
Approximately 1 hour into the flight from London we started smelling an acrid smell in the cockpit. Immediately after that the International Relief Officer (IRO) called up from the cabin to say that seat 3A was smoking and that they had: removed the passenger; removed the power from the seat and In-Flight Entertainment (IFE) system and had used a squirt of the halon fire extinguisher just to make sure that any fire was a non-issue.While this was going on I messaged Dispatch to let them know the initial problem and we reviewed checklists and contingency plans and planned on diverting to a nearby [airport] if necessary. The lead flight attendant and IRO called back to say that the smoke had rapidly dissipated when the power was turned off. No hot spots remained. They'd removed all flammables from the area including newspapers and blankets and reseated the first class passenger.We then consulted with [Maintenance] and Dispatch again and they reiterated to keep the IFE switch off for the rest of the flight. After consulting with both FOs; Dispatch; [Maintenance] and the lead flight attendant we were all confident that the fire was out and posed no safety threat. We concluded that the safest course of action was to continue on our route of flight and we landed uneventfully. A logbook write up was made.
[Report narrative contained no additional Information.]
B757 flight crew on an international leg reported the cabin crew successfully dealt with an overheating passenger seat power issue.