This document has been declared "CANCELLED" as of August 2011. By this action, this document will remain listed in the Numercial Section of the Aerospace Standards Index.This Aerospace Standard (AS) covers the general minimum performance standards of A-C generators and associated regulators for civil aircraft. The generator is a nominal 120/208-volt, 400-Hz, 3-phase, Y-connected system that provides the primary or backup power for electrical systems. The machine can be a brush or brushless design and is normally air cooled.