Archive: https://archive.today/HxZDq From the post: >>Delta Air Lines is replacing power units on more than 300 of its Airbus jets in an effort to stem cases in which toxic fumes have leaked into the air supply and led to health and safety risks for passengers and crew. The move is one of the most aggressive efforts by a major U.S. airline to address what in recent years has increasingly become a hidden hazard of modern air travel. The airline is about 90% of its way through the process of upgrading the engines, a type known as the auxiliary power unit, on each of its Airbus A320 family jets, according to a spokesman for Delta. The airline operates 310 of the narrow-body type, including 76 of the latest generation models as of the end of June.