Where does the engine receive its electrical power from?

Where does the engine receive its electrical power from?

• A. Ground Power Unit
• B. Engine Alternator
• C. External Power Source
• D. Auxiliary Battery

Answer: (B)

The engines feed the helicopter’s electrical system through their alternators mounted on the accessory gearboxes. When the engines are running, each engine-driven generator supplies power to the electrical buses and charges the batteries, providing normal operation and redundancy if one engine drives the other generator. Ground Power Units or External Power Sources only supply power when the engines aren’t running or during ground operations, and the Auxiliary Battery is a limited back-up power source used primarily for starting and sustaining essential systems if generation is lost.

The engines feed the helicopter’s electrical system through their alternators mounted on the accessory gearboxes. When the engines are running, each engine-driven generator supplies power to the electrical buses and charges the batteries, providing normal operation and redundancy if one engine drives the other generator. Ground Power Units or External Power Sources only supply power when the engines aren’t running or during ground operations, and the Auxiliary Battery is a limited back-up power source used primarily for starting and sustaining essential systems if generation is lost.