What is the function of a power distribution panel (PDP) in aircraft systems?

• A. To regulate engine speeds.
• B. To monitor cabin temperature.
• C. To control and distribute power to buses and loads, and monitor protective devices.
• D. To convert AC to DC.

Answer: (C)

The main idea is that power from the aircraft’s generators and sources must be routed safely to all the electrical loads that keep the airplane operating. The power distribution panel is the central hub for this process. It controls feeds to the electrical buses and individual loads, and houses protective devices like circuit breakers. If a fault occurs, the PDP can trip the appropriate breaker to isolate the problem, protecting equipment and allowing the rest of the system to keep functioning. It also provides status information about which buses are energized. This role is about distributing power and enforcing protection, not about changing engine speed, sensing cabin temperature, or converting AC to DC. Those functions are handled by other components in the aircraft’s electrical and environmental systems.