Technical analysis of the accident : Swiss Flight LX1885 with an Airbus A220 – from uncontained engine failure via smoke on board, a dead flight attendant to alleged cover up at Austrian's federal safety investigation authority (SUB)

Abstract

Air conditioning systems of all large passenger aircraft (except the Boeing 787) take the air unfiltered from the compressor of the engine (bleed air)! Any contamination in normal operation and in failure cases (as in LX1885) goes straight into cockpit and cabin. Such a system design is inadequate as stated for decades in SAE AIR 1168-7A: "... the risk of obtaining contaminated air from the engine may preclude its use for transport aircraft, regardless of other reasons [like financial advantages]." --- Why is smoke on board after a severe engine failure? The air conditioning system takes air from the engine! --- Why a dead flight attendant? Oil fumes are toxic, and aircraft do not offer adequate breathing protection! --- Why is the Austrian Air Accident Investigator (SUB) providing an intermediate report below standards? Why is the Austrian Air Accident Investigator (SUB) prosecuted? Why is the case transferred to the STSB in Switzerland? Aircraft manufacturers / airlines do not have an interest that the answers given above get into an (intermediate) report!