Definition
In a multi-engine airplane, the minimum altitude at which the pilot can safely maneuver the airplane following the failure of one engine, allowing time to identify the problem, configure the airplane, and either return for landing or continue flight to a suitable airport. It is established based on terrain, obstacles, aircraft performance with one engine inoperative, and the pilot's proficiency.
Plain English
The lowest height at which a multi-engine airplane can still be flown safely if one engine quits. Below this altitude, the pilot may not have enough room or performance to recover and continue flying.
Context Anchor
Used in multiengine takeoff planning and training, especially when briefing what to do if an engine quits shortly after liftoff.
Derivation
“Single-engine” means only one engine is producing useful power. “Maneuver” comes through French from an older idea of work done by hand; in flying, it means deliberately controlling and positioning the airplane, not just being airborne.
Why Pilots Care
It directly determines whether a pilot should attempt a turn-back to the airport or continue straight ahead after an engine failure, affecting survival odds in the critical seconds after liftoff.
Intuition Check
Do not read “maneuvering” here as aerobatics or sharp turns. It means the airplane has enough height for deliberate control actions with one engine not producing power.
Example Sentence 1
Before takeoff, the pilot briefed the single-engine maneuvering altitude so both crew members knew the height above which a return to the airport would be considered.
Example Sentence 2
During the briefing the instructor set single-engine maneuvering altitude at 800 feet AGL for that day’s conditions and aircraft performance.