What has priority over windshield anti-ice when APU GEN is sole source of power?

What has priority over windshield anti-ice when APU GEN is sole source of power?

• A. Engine Anti-Ice Valves
• B. Backup Hydraulic Pump
• C. Cabin Heat
• D. Fuel Pump

Answer: (B)

When only the APU generator is providing power, preserving flight-control capability has the highest priority. The backup hydraulic pump is what keeps the hydraulic actuation of the flight controls alive, so it must be maintained to retain controllability. Windshield anti-ice is an electrical load used for visibility, but it can be reduced or shed to conserve power and ensure the pilots still have control of the helicopter. In short, keeping the hydraulics energized to maintain control takes precedence over windshield anti-ice under limited power conditions.

When only the APU generator is providing power, preserving flight-control capability has the highest priority. The backup hydraulic pump is what keeps the hydraulic actuation of the flight controls alive, so it must be maintained to retain controllability. Windshield anti-ice is an electrical load used for visibility, but it can be reduced or shed to conserve power and ensure the pilots still have control of the helicopter. In short, keeping the hydraulics energized to maintain control takes precedence over windshield anti-ice under limited power conditions.