At what engine speed (N2) does the FADEC receive power from its own alternator?

The FADEC (Full Authority Digital Engine Control) system begins to receive power from its own alternator at 50% N2 engine speed. This threshold is critical because it ensures that the FADEC has stable and reliable power to operate the engine control functions and maintain optimal performance once the engine is at a sufficient speed.

At or above this engine speed, the alternator provides the necessary electrical power for the FADEC to manage engine parameters effectively, allowing for proper fuel flow management, ignition timing, and other essential engine control tasks. This capability supports the engine's operation and contributes to overall safety and efficiency. Understanding this aspect of FADEC functionality is vital for the operation and maintenance of modern jet engines.