From the article: ”The A350-900 was certified for a full load of up to 440 passengers to be evacuated within 90 seconds with only half of the exits usable. It

From the article: ”The A350-900 was certified for a full load of up to 440 passengers to be evacuated within 90 seconds with only half of the exits usable. It was not immediately clear what portion of the 18-minute operation was spent physically getting passengers down slides”