During an autostart, the FADEC automatically ________ the igniters at each start.

In the context of an autostart process for the A320 aircraft, the FADEC (Full Authority Digital Engine Control) system is responsible for managing critical engine functions, including the ignition process during engine start-up. The igniters are crucial components that initiate the combustion process by creating sparks to ignite the fuel-air mixture.

The term "alternates" in this context refers to the way the FADEC controls the operation of the igniters during the autostart sequence. Specifically, the FADEC alternates the activation of the igniters to ensure even wear and optimal performance. This alternating pattern helps prevent overheating and extends the life of the igniter plugs by not relying on just one igniter consistently for every engine start.

By alternating the igniters, the FADEC effectively distributes operating time across both igniters, which is crucial for maintaining reliability and performance across multiple start attempts. This functionality exemplifies the advanced capabilities of the FADEC in managing engine performance while minimizing maintenance concerns.