Definition
A computerized engine control system that fully manages all aspects of engine operation — including fuel flow, ignition timing, and (where applicable) propeller settings — without any mechanical backup. The system uses sensor data and digital logic to optimize engine performance across all flight conditions, replacing the pilot's traditional mixture, ignition timing, and (in some installations) propeller controls.
Plain English
A computer that runs the engine for you. It decides how much fuel to deliver and when the spark plugs fire, adjusting continuously based on what the engine and aircraft are doing. There is no manual override — the computer is in charge of those functions.
Context Anchor
Seen in engine systems discussions for aircraft equipped with FADEC-style engine management, especially when learning how engine power is controlled and what happens if the electronic control system loses required electrical power.
Derivation
Full authority' means the computer has complete control over the engine — there is no mechanical fallback the pilot can switch to. 'Digital electronic' distinguishes it from older analog or mechanical control systems. The phrase together signals: a computer is fully in charge, not just assisting.
Why Pilots Care
It reduces pilot workload, prevents engine damage from improper settings, improves fuel efficiency, and increases reliability across changing flight conditions.
Analogy
It is like asking for a cabin temperature and letting a thermostat handle the heater or air conditioner. You choose the desired result; the control system manages the detailed adjustments.
Intuition Check
Full authority does not mean the engine can do anything or ignore limits. It means the electronic controller has command over the engine-control functions throughout normal operation.
Example Sentence 1
The aircraft's full authority digital electronic control automatically adjusted fuel flow as the pilot climbed through 8,000 feet, with no need to lean the mixture by hand.
Example Sentence 2
During the preflight check the pilot confirmed that the full authority digital electronic control was receiving valid sensor data before engine start.