The company that landed a Boeing 747 at the wrong airport in Kansas in November says one of the pilots was not sure they were landing at the right place, but kept silent.

The description is in a training video produced by Atlas Air Worldwide Holdings and obtained by Aviation International News. Atlas confirmed the accuracy of the AIN report on Tuesday but declined to provide the video to The Associated Press.

The Atlas pilots landed near Wichita, 9 miles from their intended destination.

AIN reported that one of the pilots abandoned the plane’s instrument-guided approach after spotting a runway to the left and began heading there. It turned out to be the wrong airport. AIN reported that the other pilot was uncertain about the runway but didn’t say anything.