Definition
In multi-engine airplane operations, the minimum altitude above the ground at which a pilot can safely maneuver the airplane following the failure of one engine, allowing time and height to control the airplane, identify the failure, configure for single-engine flight, and either continue flight or execute a controlled landing.
Plain English
It is the lowest height above the ground at which a multi-engine airplane can lose one engine and still be flown safely while the pilot sorts the situation out.
Context Anchor
You will see this term in multiengine takeoff planning, especially when deciding what to do if an engine fails shortly after liftoff.
Why Pilots Care
It marks the point at which an engine failure no longer forces a straight-ahead landing and instead permits a controlled turn back to the airport or suitable terrain.
Grounding Statement
Picture a twin-engine airplane just after liftoff: until it has climbed high enough, losing one engine leaves very little room to turn, troubleshoot, or recover from a poor maneuver.
Intuition Check
“Safe” does not mean risk-free, guaranteed, or the same number every time. Here, it means an altitude chosen before takeoff that gives a practical margin for single-engine control and maneuvering.
Example Sentence 1
The pilot kept the climb attitude steady until reaching safe single-engine maneuvering altitude before reducing power and beginning the cruise climb.
Example Sentence 2
With an engine failure below safe single-engine maneuvering altitude, the crew elected to land straight ahead on the remaining runway.