Definition
A condition in which the rotational force (torque) applied to or produced by an engine, propeller shaft, or component exceeds the manufacturer's published limit. In turboprop aircraft, overtorque most commonly refers to the engine producing more shaft torque than the powerplant or gearbox is rated to handle, typically during takeoff or rapid power application. An overtorque event usually requires a maintenance inspection before further flight.
Plain English
Twisting force on the engine or propeller shaft went past the maximum the manufacturer allows. Even a brief overtorque can damage internal parts and usually means the aircraft has to be inspected before flying again.
Context Anchor
Seen in turbine airplane operation, engine limitations, power-setting procedures, and post-flight maintenance writeups.
Derivation
From 'over' (beyond, exceeding) plus 'torque' (twisting force). The prefix 'over' here means 'past the allowed limit,' the same sense used in overspeed, overboost, and overtemp.
Why Pilots Care
Exceeding torque limits can damage the gearbox, propeller, or engine mounts and requires a mandatory inspection before further flight.
Intuition Check
Do not read overtorque as just “a lot of power.” It means a specific approved twisting-force limit was exceeded.
Example Sentence 1
During takeoff, the pilot advanced the power levers smoothly to avoid an overtorque.
Example Sentence 2
Maintenance performed a full inspection after the training flight recorded a brief overtorque during the simulated engine failure.