Obviosuly this can happen on any plane, but it's definitely an eye opener.

A Swiss International Airlines Bombardier C-Series CS-300, registration HB-JCD performing flight LX-1885 from Bucharest Otopeni (Romania) to Zurich (Switzerland) with 74 passengers and 5 crew, was enroute at FL400 about 20nm eastnortheast of Graz (Austria) when the crew decided to divert to Graz reporting smoke on board. The aircraft landed on Graz's runway 34 and stopped on the runway about 19 minutes after the decision to divert. The aircraft was evacuated. A rescue helicopter positioned to the aircraft on the runway, took a flight attendant under resuscitation on board and flew him to a hospital, the flight attendant died on Dec 30th 2024. About 17 passengers and a number of crew needed medical attention, too. According to information The Aviation Herald received the left hand engine suffered an oil leak causing the smoke, the engine seized as result of an uncontained failure leading to the suspicion that the main shaft might be fractured. The engine is being replaced.