Definition
A planned segment of the takeoff and initial climb in a multi-engine airplane during which the pilot has pre-determined the action to take if an engine fails. It is bounded by a low point — typically the speed and altitude below which the airplane cannot safely continue the takeoff and must be landed straight ahead — and a high point at which the airplane has reached a speed and altitude that allows a controlled climb on the remaining engine. Within this area, the outcome depends on judgment, configuration, and performance, and the appropriate response is decided in advance.
Plain English
It's the part of the takeoff where, if an engine quits, the pilot has already decided what to do. Below it, you land. Above it, you fly. Inside it, the choice was made before the takeoff roll began.
Context Anchor
Used in takeoff planning and engine-failure briefings before departure, especially when thinking through what to do immediately after liftoff.
Derivation
Decision comes from a Latin idea meaning “to cut off.” That fits this aviation use: after an engine failure just after liftoff, the pilot does not have time to consider every possible option for long; unsafe options must be cut off quickly.
Why Pilots Care
It determines the safest immediate action to avoid terrain or obstacles when engine power is lost during initial climb.
Grounding Statement
Picture the airplane just airborne, still close to the runway: if the engine stops there, the pilot has only seconds to lower the nose, keep control, and choose the safest landing path.
Intuition Check
Do not read “area of decision” as a marked box or exact spot on the airport. Here it means the practical part of the takeoff path where the pilot must make an immediate safety decision if the engine fails.
Example Sentence 1
During the takeoff briefing, the pilot identified the area of decision for engine failure after lift-off and stated that below 200 feet they would land straight ahead.
Example Sentence 2
Training stressed that once past the area of decision for engine failure after lift-off, a safe return to the runway may no longer be possible.