The DC-AC Inverter and Maintenance Power System is extremely convenient for crews performing electrical system troubleshooting and maintenance, especially crews that are deployed to remote airfields and without access to an external power cart. Flight crews also find the system useful for setting radios and navigation equipment, pre-flight planning, and checking fuel.
The DC-AC Inverter and Maintenance Power System provides power to the aircraft’s entire DC electrical system and instrument panel without attaching an external power cart or starting the APU. While the system is active the aircraft behaves as if the #2 DC Converter is online, activating all DC electrical systems. The power to accomplish this task is taken from the upgraded battery (included with the required Electric APU Starter Conversion). At the same time, the system provides AC electrical power to the aircraft’s instrument panel (only).
The system consists of a Ground Mainentance Power Unit (GMPU), a panel assembly, and a wiring kit. The GMPU mounts inside the nose avionics compartment, alongside the upgraded battery. The panel assembly is installed in the cockpit lower console. Before installation of this system, the aircraft must be equipped with the Aerocraft H-60 Electric APU Starter Conversion, which includes an upgraded main aircraft battery.