Headphone Case Forces SWISS Flight to Divert
A SWISS flight bound for New York was diverted to Bangor, Maine, on 27 July after smoke was detected in the cabin. The source was later traced to a headphone charging case that had slipped between the seats and become trapped in the mechanism. Damage to the case caused its lithium battery to overheat, prompting the crew to land the aircraft safely for inspection.
How a Charging Case Diverted the Flight
- Route: Zurich–New York JFK
- Incident date: 27 July 2026
- Diversion: Bangor International Airport, Maine
- Device involved: Headphone charging case with a power bank function
- Cause: The case slipped into a seat, became trapped and was damaged
- Result: The device overheated and produced smoke; the aircraft landed safely
The UK Civil Aviation Authority says reports involving overheating or malfunctioning passenger devices nearly doubled between 2024 and 2025. Power banks, spare lithium batteries and vapes belong in cabin baggage. SWISS allows two power banks per person, bans their use or charging on board, and requires them to stay on the passenger, in a seat pocket or in a bag beneath the seat, not overhead or checked.
The incident highlights why lithium-powered items should remain accessible during a flight. Power banks, spare batteries and vapes belong in cabin baggage, where crew can respond quickly if they overheat or begin smoking. Larger devices such as laptops and tablets should be switched off completely if an airline permits them in checked baggage. Rules can vary, so the carrier’s guidance should be checked before.
Small charging cases can be damaged just as easily as larger power banks, particularly if they slip into a seat mechanism. Travellers should not adjust the seat or try to retrieve a trapped device themselves. Cabin crew should be told immediately if an electronic item is lost, unusually hot, swollen, damaged or producing smoke. A quick warning can prevent a minor battery fault becoming a diversion.