»As a result of sleep deprivation, on day 36, Timm dozed off at the controls and the plane flew by itself for over an hour, at an altitude of just 4,000 feet.«

https://edition.cnn.com/travel/article/longest-ever-continuous-flight-1959/index.html [https://edition.cnn.com/travel/article/longest-ever-continuous-flight-1959/index.html]