Definition
A condition in which an aircraft engine's operating temperature rises above its normal range, typically indicated by cylinder head temperature (CHT) or oil temperature exceeding manufacturer limits. Causes include prolonged high-power climbs, low airspeed reducing cooling airflow, lean fuel mixtures, low oil quantity, or restricted cooling air paths. Sustained overheating can lead to detonation, pre-ignition, loss of power, accelerated engine wear, and in severe cases engine failure.
Plain English
The engine is running hotter than it should. If it stays too hot for too long, it can be damaged or quit running.
Context Anchor
Seen in emergency procedures, engine instrument checks, climbs, slow flight, and simulated or actual emergency landing scenarios.
Why Pilots Care
Overheating can lead to power loss, engine damage, or fire at low altitude where options are limited.
Grounding Statement
Picture a long climb on a hot day: the airplane is working hard, cooling airflow may be limited, and the engine temperature can rise beyond the safe range.
Intuition Check
Engine overheating does not mean the engine is already on fire. It means the engine is hotter than it should be, and that heat can quickly lead to damage or loss of power.
Example Sentence 1
During the long climb out of a high-elevation airport, the pilot noticed the cylinder head temperature climbing toward the red line and lowered the nose to prevent engine overheating.
Example Sentence 2
In the emergency checklist the instructor pointed out engine overheating as one possible reason for sudden power loss on final approach.