A Swiss International Air Lines Airbus A330-300 bound for Boston was forced into an unscheduled diversion to Dublin in the early hours of Monday after a passenger's power bank began emitting smoke in the cabin, prompting the crew to declare an emergency over the North Atlantic.
Flight LX52 had departed Zurich at 18:11 on Sunday, August 9, carrying 206 passengers on the transatlantic service to Boston Logan International Airport. The widebody, registered HB-JHN, was over the ocean when cabin crew became aware of smoke and the flight deck requested a priority landing, turning the aircraft toward Dublin Airport.
The A330 landed safely in the Irish capital at 03:07 local time on Monday morning. According to SWISS, the smoke was traced to a portable power bank that had become lodged in the reclining mechanism of a passenger's seat, where it overheated and began to smoulder. No injuries were reported, and passengers were accommodated in hotels overnight while the aircraft was inspected.
Ireland's Air Accident Investigation Unit has opened an inquiry into the event, a routine step for occurrences of this type. The crew's decision to divert rather than continue across the Atlantic reflects standard practice when smoke is detected in the cabin, where the priority is to get the aircraft on the ground as quickly and safely as possible.
Portable power banks are built around lithium-ion cells, which can enter thermal runaway and emit smoke or catch fire if they are crushed, punctured or short-circuited. Seat reclining mechanisms have become a recurring culprit, as devices slip into the gaps around the seat frame and are then compressed when a passenger adjusts the seat. For that reason, a growing number of carriers now ask passengers to keep power banks within reach and to avoid stowing them in seat-back pockets or allowing them to fall into seat mechanisms.
The incident was strikingly similar to another SWISS diversion only weeks earlier. In late July, a SWISS service from Zurich to New York diverted to Bangor, Maine, after an item reported to be a headphone case became trapped in a seat and started emitting smoke. Two comparable events in a matter of weeks underline how routine passenger electronics can trigger a mid-flight emergency on long over-water sectors.
The Airbus A330-300 is a workhorse of SWISS's long-haul fleet, typically deployed on transatlantic and other intercontinental routes from its Zurich hub. Diversions of this kind, while disruptive, are resolved without harm in the overwhelming majority of cases thanks to established cabin-crew procedures for isolating and containing an overheating device.
Sources: AVHerald, Swissinfo. Featured image: AI-generated by AviationShop. By Marco Bianchi.
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