The crash of Swissair flight 306 was caused by a combination of institutional failures, including a dangerous in-house fog dispersal procedure and insufficient regulatory oversight, which led to a catastrophic wheel failure and subsequent fire that brought down the nearly new Caravelle jet.
A combination of obscure environmental factors and seemingly insignificant operational conditions led to the unexpected dual engine failure of British Airways flight 38 just seconds before landing, highlighting the dangers of "unknown unknowns" and the importance of thorough investigation to uncover hidden vulnerabilities in aircraft systems.