Definition
An operating condition in which a turboprop engine produces more torque at the propeller shaft than the manufacturer's published limit, even briefly. An over torque event must be recorded in the aircraft logbook and may require maintenance inspection before further flight, depending on how far the limit was exceeded and for how long.
Plain English
The engine has been pushed harder than it is rated to handle, producing more twisting force on the propeller shaft than allowed. It is a limit exceedance that has to be written up and inspected.
Context Anchor
Seen in turboprop power management, especially during takeoff, go-around, and rapid power changes.
Derivation
Torque comes from the Latin 'torquere,' meaning 'to twist.' It is the twisting force the engine applies to the propeller shaft. 'Over torque' simply means twisting force above the allowed limit.
Why Pilots Care
Exceeding torque limits can damage the gearbox, propeller shaft, or engine mounts and may lead to in-flight failure or expensive repairs.
Intuition Check
Over torque does not mean the engine simply made a lot of power. It means the engine exceeded a specific torque limit published for that airplane or engine.
Example Sentence 1
During the rapid power application on takeoff, the pilot watched the torque gauge carefully to avoid an over torque.
Example Sentence 2
High density altitude takeoffs require careful propeller and power management to avoid an over torque condition.