Definition
An electronic engine management system that uses a computer to fully control all aspects of engine operation, including fuel flow, ignition timing, and mixture, without mechanical backup linkages. The pilot moves a single power lever, and the computer continuously adjusts engine parameters to deliver the requested power while protecting the engine from damage.
Plain English
A computer that runs the engine. The pilot sets the power they want, and the computer handles the fuel, ignition, and mixture automatically.
Context Anchor
Seen in descriptions of modern aircraft engine systems, especially when comparing electronically controlled engines with engines that require more direct pilot adjustment.
Derivation
"Full authority" means the computer has complete control over the engine with no mechanical override. "Digital" means it uses a computer rather than mechanical or analog systems. Together: a computer that is fully in charge of running the engine.
Why Pilots Care
It reduces pilot workload, prevents engine exceedances, and maintains optimal performance and efficiency across all phases of flight.
Intuition Check
“Full authority” does not mean unlimited power or legal permission. Here, it means the engine computer has direct command over engine settings within the aircraft’s approved limits.
Example Sentence 1
The new trainer uses a single-lever power control because its engine has full authority digital engine control.
Example Sentence 2
During the approach the full authority digital engine control automatically adjusted engine output to maintain the selected airspeed without further pilot input.