[genewitch]

the "accident" refers to title 14 part 121 of the CFR, where an accident is after disembark with the intent to fly and before landing where a person is "seriously injured or killed" per 49 CFR section 830.2 (https://www.ecfr.gov/current/title-49/subtitle-B/chapter-VII...); and it's any injury where hospitalization is required for more than 48 hours, or a fracture of any bone except simple fractures of fingers, toes, nose.

it does not mean "crash", although a crash would be included. Specifically, bouncing off the ceiling and fracturing your arm or whatever would count as an accident per the definition.

it's completely valid as a refutation of the bbc article.