Bern, Aug. 26 – A Swiss International Airlines Boeing 777-300, registration HB-JNF, operating flight LX-9 from Chicago O’Hare to Zurich, encountered an unidentified acrid odour in the economy class cabin while cruising at flight level 370 over the Atlantic Ocean on August 25th 2026. Positioned approximately 780 nautical miles north-northwest of Lajes Airport on Terceira in the Azores, the crew of the Swiss B773 promptly decided on a precautionary diversion to ensure passenger and crew safety amid the unexpected cabin condition.
#breaking #AviationNews @FlySWISS flight #LX9 from #chicago ORD to #Zurich ZRH, Boeing 777-300ER (Reg. HB-JNF), declared emergency code 7700 over north Atlantic. #airlines #airlinesnews #incident #AeroNewsJournal pic.twitter.com/NxD4emvLvL
— Aero News Journal-Daily Aviation News (@FlyingFreak73) August 25, 2026
The aircraft, carrying 222 passengers and 16 crew members, declared an emergency and diverted safely, landing on Lajes runway 33 roughly 90 minutes later without further incident. Upon arrival, all occupants disembarked normally under their own power after the plane taxied clear of the runway. Medical checks were conducted for those affected by the Swiss B773 odour on board incident over the Atlantic.
Five passengers and one cabin crew member reported temporary symptoms including irritated eyes, nausea and headaches linked to the pungent odour detected during the transatlantic flight. No additional medical treatment proved necessary following these evaluations. The airline confirmed the odour remained unidentifiable at the time of the safe landing on August 25th 2026.
Investigators continue examining the Swiss B773 to determine the precise source of the cabin odour that prompted the Atlantic diversion. A replacement Boeing 777 has been dispatched to Lajes to transport the passengers and crew onward to Zurich, restoring operations after this notable aviation event involving the Swiss International Airlines aircraft.