Derated Takeoff

Definition

A takeoff using less than maximum engine thrust to reduce engine wear, noise, and increase engine life. Performance calculations are adjusted for the reduced thrust level. Common practice in airline operations.

Related Terms

Flex Temperature

An assumed temperature higher than actual used to derate engine takeoff thrust. ...

Test your knowledge

Think you understand Derated Takeoff? Challenge yourself with practice questions covering operations and all other ATPL subjects.

Start a Practice Quiz

Or browse all >1,300 questions by subject