Since 2000, fatigue has played a role in about 20 accidents or incidents we've investigated, and 15 of those events involved the crew and pilots. A number of those events involved private airplanes. In the commercial sector, fatigue or fatigue management has played a role in five or six cases, and that's out of many investigations. However, in the rail transportation sector, we found that the fatigue factor has contributed in a higher proportion to incidents and accidents. That's why we included the fatigue factor on our watchlist for freight trains and not for air transportation.
On April 4th, 2017. See this statement in context.