Originally Posted by c17heavy

ref is afi 11-401, pg 92.

"The landing is when the aircraft is on the ground after being airborne and any of the following conditions occur: (a) The engines are stopped and shutdown occurs at or before five minutes after touchdown. (b) The aircraft has been on the ground for five minutes after touchdown; however, a series of practice landings is considered one flight. (c) A change is made in the crew where a crewmember enplanes or deplanes."

...the addition of 5 min is debated by some.