Which component can supply electrical power to the UH-72?

• A. External Power Unit
• B. Starter/Generators
• C. Battery
• D. None of the above

Answer: (B)

Electrical power for the UH-72 is provided by the engine-driven starter/generator units. When the engines are turning, these units generate the electricity the avionics, lights, and other systems need, and they also serve as the starters to start the engines. An external power unit can power the aircraft on the ground without starting the engines, but it’s not the normal power source in flight. The battery offers only limited, short-term power for starting or backup and cannot sustain the full electrical load for extended periods. So the starter/generators are the component that supplies electrical power to the UH-72.