Igniter A is powered by which power source?

Igniter A is powered by which power source?

• A. AC Essential Bus
• B. DC Essential Bus
• C. Engine Integrated Drive Generator
• D. FADEC Alternator

Answer: (A)

Ignition A draws its power from the AC Essential Bus because the ignition system requires an AC electrical source, and the essential bus is the dedicated, reliable AC supply designed to feed critical systems during start and in electrical faults. The DC Essential Bus delivers DC power, which isn’t appropriate for the ignition exciters. The Engine Integrated Drive Generator provides power only when the engine is turning, so it isn’t the primary source for ignition during start or abnormal conditions. The FADEC alternator powers the FADEC, not the ignition exciters. Route ignition A to the AC Essential Bus ensures continuous igniter operation with the proper power type and redundancy.

Ignition A draws its power from the AC Essential Bus because the ignition system requires an AC electrical source, and the essential bus is the dedicated, reliable AC supply designed to feed critical systems during start and in electrical faults. The DC Essential Bus delivers DC power, which isn’t appropriate for the ignition exciters. The Engine Integrated Drive Generator provides power only when the engine is turning, so it isn’t the primary source for ignition during start or abnormal conditions. The FADEC alternator powers the FADEC, not the ignition exciters. Route ignition A to the AC Essential Bus ensures continuous igniter operation with the proper power type and redundancy.